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A269079 Number of 5Xn binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once. 1
32, 244, 2343, 20400, 165607, 1383105, 10778640, 86308622, 661641931, 5146079168, 39031235709, 297777942033, 2239241624640, 16861326990168, 125878250277823, 939067269600080, 6967653661432115, 51619835791134129, 381021973991495280 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 5 of A269075.
LINKS
FORMULA
Empirical: a(n) = 8*a(n-1) +52*a(n-2) -424*a(n-3) -816*a(n-4) +6756*a(n-5) +1362*a(n-6) -38476*a(n-7) +19016*a(n-8) +82920*a(n-9) -70008*a(n-10) -50556*a(n-11) +50607*a(n-12) +9180*a(n-13) -10404*a(n-14)
EXAMPLE
Some solutions for n=4
..0..0..0..0. .1..0..1..0. .0..0..0..1. .0..0..0..1. .0..0..0..1
..0..0..0..1. .0..0..1..0. .1..0..0..0. .0..1..0..1. .0..0..1..0
..0..1..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..1. .0..0..0..0
..0..1..0..0. .0..0..0..0. .1..0..0..0. .0..1..0..1. .0..0..0..0
..0..0..0..1. .0..1..1..0. .1..0..1..0. .0..1..0..1. .1..0..1..0
CROSSREFS
Cf. A269075.
Sequence in context: A226098 A096960 A231304 * A134846 A066392 A300565
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 19 2016
STATUS
approved

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Last modified March 2 12:29 EST 2024. Contains 370467 sequences. (Running on oeis4.)