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A268763
Number of nX5 binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two exactly once.
1
10, 105, 762, 5170, 32056, 193573, 1129042, 6475898, 36505596, 203462597, 1122256900, 6140903312, 33367393732, 180252797855, 968778729426, 5183858768244, 27630592631158, 146768594783741, 777214421588348
OFFSET
1,1
COMMENTS
Column 5 of A268766.
LINKS
FORMULA
Empirical: a(n) = 4*a(n-1) +28*a(n-2) -62*a(n-3) -314*a(n-4) +78*a(n-5) +867*a(n-6) +6*a(n-7) -859*a(n-8) +46*a(n-9) +215*a(n-10) -8*a(n-11) -16*a(n-12)
EXAMPLE
Some solutions for n=4
..1..0..1..0..0. .1..0..0..0..1. .1..0..0..0..0. .0..0..0..0..0
..0..0..0..0..0. .0..0..1..0..1. .0..0..1..0..1. .0..0..0..0..0
..1..0..0..0..0. .0..0..0..0..0. .0..1..0..0..0. .0..1..0..1..0
..0..1..0..0..1. .1..0..0..0..1. .0..0..0..1..0. .1..0..0..0..0
CROSSREFS
Cf. A268766.
Sequence in context: A077671 A117833 A117832 * A300850 A360276 A210136
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 13 2016
STATUS
approved