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3-adic valuation: A007949, A051064
3-almost primes: A014612*, A072114 ("pi"), A109251
3-colored: (1) A000685 A006201 A006964 A027710 A029857 A036252 A038050 A038059 A038060 A038061 A038062 A038076
3-colored: (2) A038079 A038080 A053762
3-connected: (1) A000109 A000944 A002880 A005644 A005645 A006290 A006445 A007083 A007084 A007085 A007100 A047051
3-connected: (2) A049337 A052444
3-connected: see also graphs, 3-connected
3-dimensional arrays of numbers, sequences related to :

3-dimensional arrays: (1) A046816 (Pascal's tetrahedron), A056558 A056559 A056560 A112096 A112481 A113198 A113200 A124939 A126682 A130046 A144625

3-dimensional arrays: (2) A144626 A181386 A182631 A209314 A209655 A209918 A210763 A210960 A210961 A221649 A221650 A268240

3-dimensional arrays: (3) A275122 A321951 A335156

3-dimensional arrays: see also A144625, A127325, A127326, A127327

3-gonal numbers: see triangular numbers A000217
3-plexes: A003189, A051240
3-polyhedra: A006868
3-smooth numbers: A003586
3-term arithmetic progressions, no, see entry for non-averaging sets
3-trees: A000672 A002658 A003035 A003611 A003612 A006894 A007135 A007136 A036362
3n - sigma(n): see under n -> 3n - sigma(n)
3x+1 Conjecture: see 3x+1 problem
3x+1 problem , sequences related to :

3x+1 problem, (01): A000546, A001281, A005186, A006370* (image of n), A006460, A006513, A006577* (steps to reach 1), A006666, A006667, A006877, A006878, A006884

3x+1 problem, (02): A006885, A008873, A008874, A008875, A008876, A008877, A008878, A008879, A008880, A008882, A008883, A008884

3x+1 problem, (03): A008908, A010120, A016945, A025586, A025587, A033478, A033479, A033480, A033481, A033491, A033492, A033493

3x+1 problem, (04): A033494, A033495, A033496, A033958, A033959, A039508, A045474, A045475, A045476, A055509, A055510, A056959

3x+1 problem, (05): A060322, A060409, A060410, A060411, A060412, A060413, A060414, A060415, A060445, A060565, A061641, A062052

3x+1 problem, (06): A062053, A062054, A062055, A062056, A062057, A062058, A062059, A062060, A064684, A064685, A066756, A066773

3x+1 problem, (07): A066861, A069206, A069323, A070165, A070167, A072761, A075677, A078719, A078720, A092892, A092893, A103469 (possible number of connected components)

3x+1 problem, (08): A112695, A116623, A116640, A116641, A128333, A131450, A133419, A133420, A133421, A133422, A133423, A133424

3x+1 problem, (09): A133425, A133426, A135282, A138750, A138751, A138752, A138753, A138754, A138757, A139391, A139399, A139435

3x+1 problem, (10): A139436, A175871, A192719, A219696, A266551, A266552, A291939

3x+1 problem, J. C. Lagarias's 3x+1 Problem Annotated Bibliography

3^n: A000244*

• This is a section of the Index to the OEIS®.
• For further information see the main Index to OEIS page.
• Please read Index: Instructions For Updating Index to OEIS before making changes to this page.
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