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URL: https://oeis.org/A045806

⇱ A045806 - OEIS


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A045806
6-ish numbers (end in 23, 27, 61, 89).
1
23, 27, 61, 89, 123, 127, 161, 189, 223, 227, 261, 289, 323, 327, 361, 389, 423, 427, 461, 489, 523, 527, 561, 589, 623, 627, 661, 689, 723, 727, 761, 789, 823, 827, 861, 889, 923, 927, 961, 989, 1023, 1027, 1061, 1089, 1123, 1127, 1161, 1189, 1223, 1227
OFFSET
1,1
LINKS
FORMULA
Empirical g.f.: x*(23+4*x+34*x^2+28*x^3+11*x^4)/(1-x-x^4+x^5). - Colin Barker, Jan 23 2012
PROG
(Haskell)
import Data.List (findIndices)
a045806 n = a045806_list !! (n-1)
a045806_list = findIndices (`elem` [23, 27, 61, 89]) $ cycle [0..99]
-- Reinhard Zumkeller, Jan 23 2012
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
EXTENSIONS
More terms from Erich Friedman
STATUS
approved