VOOZH about

URL: https://oeis.org/A183450

⇱ A183450 - OEIS

login
A183450
T(n,k)=Number of nXk binary arrays with every 1 having exactly two king-move neighbors equal to 1.
8
1, 1, 1, 1, 5, 1, 1, 9, 9, 1, 1, 13, 18, 13, 1, 1, 33, 30, 30, 33, 1, 1, 69, 107, 72, 107, 69, 1, 1, 121, 265, 283, 283, 265, 121, 1, 1, 253, 553, 831, 2054, 831, 553, 253, 1, 1, 529, 1505, 2399, 9208, 9208, 2399, 1505, 529, 1, 1, 1013, 3852, 7761, 34867, 53608, 34867, 7761
OFFSET
1,5
COMMENTS
Table starts
.1....1....1.....1.......1........1..........1...........1............1
.1....5....9....13......33.......69........121.........253..........529
.1....9...18....30.....107......265........553........1505.........3852
.1...13...30....72.....283......831.......2399........7761........23840
.1...33..107...283....2054.....9208......34867......176949.......833001
.1...69..265...831....9208....53608.....257733.....1817225.....11414889
.1..121..553..2399...34867...257733....1744887....16192521....132651622
.1..253.1505..7761..176949..1817225...16192521...216103851...2491241396
.1..529.3852.23840..833001.11414889..132651622..2491241396..39184763856
.1.1013.8922.72396.3619285.65073225.1038281076.26807184942.568464533358
LINKS
EXAMPLE
Some solutions for 6X5
..0..1..0..0..0....1..1..0..1..1....1..1..0..0..1....0..0..0..1..1
..1..0..1..0..0....0..1..0..1..0....1..0..0..1..1....0..0..0..1..0
..1..0..1..0..0....0..0..0..0..0....0..0..0..0..0....0..1..0..0..0
..1..0..0..1..0....0..0..1..1..0....0..0..0..1..1....1..0..1..0..0
..0..1..0..1..0....0..1..0..0..1....1..1..0..0..1....1..0..1..0..0
..0..0..1..0..0....0..0..1..1..0....1..0..0..0..0....0..1..0..0..0
CROSSREFS
Column 2 is A089977(n+1)
Sequence in context: A046579 A153108 A157174 * A296128 A131061 A157169
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 04 2011
STATUS
approved