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A268883 Number of nX5 binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once. 1
10, 158, 2190, 27130, 317966, 3596174, 39670270, 429588382, 4585939726, 48401059362, 506108414670, 5251396681678, 54134020936742, 554930619106590, 5661171443312270, 57509255942550986, 582036972222995470 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A268886.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 26*a(n-1) -241*a(n-2) +994*a(n-3) -2060*a(n-4) +2218*a(n-5) -1201*a(n-6) +290*a(n-7) -25*a(n-8) for n>9

EXAMPLE

Some solutions for n=4

..1..0..0..0..0. .1..0..0..0..1. .0..0..1..0..0. .0..1..0..1..0

..1..0..0..1..0. .0..0..0..1..0. .1..0..0..1..0. .0..1..0..0..0

..1..1..0..0..0. .0..1..0..0..0. .1..0..1..0..1. .0..0..0..1..0

..0..0..1..0..1. .0..0..1..0..0. .1..0..0..0..1. .0..0..0..1..1

CROSSREFS

Cf. A268886.

Sequence in context: A306034 A129460 A200989 * A283721 A239761 A245916

Adjacent sequences:  A268880 A268881 A268882 * A268884 A268885 A268886

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 15 2016

STATUS

approved

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Last modified October 18 08:58 EDT 2021. Contains 348067 sequences. (Running on oeis4.)