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A269015 Number of 5Xn binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once. 1
0, 145, 1066, 14240, 109058, 1049588, 8134304, 69184207, 534525058, 4286305792, 32838001316, 255036784680, 1935580387968, 14746081110093, 110945210978202, 834598743197152, 6232287294972630, 46465158121063708, 344786403529703264 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 5 of A269011.

LINKS

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

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

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

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

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

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

CROSSREFS

Cf. A269011.

Sequence in context: A031702 A297732 A296972 * A234116 A232151 A264284

Adjacent sequences:  A269012 A269013 A269014 * A269016 A269017 A269018

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2016

STATUS

approved

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Last modified April 21 17:04 EDT 2021. Contains 343156 sequences. (Running on oeis4.)