A281404 - OEIS

A281404

Number of 5 X n 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

0, 160, 1413, 2886, 5892, 10130, 16241, 25680, 41353, 67226, 108849, 176500, 287083, 467706, 762549, 1242828, 2024499, 3295966, 5361623, 8713840, 14148393, 22950214, 37193019, 60220156, 97418383, 157461854, 254309175, 410409716, 661848005

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OFFSET

1,2

COMMENTS

Row 5 of A281400.

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) -6*a(n-2) +6*a(n-3) -7*a(n-4) +8*a(n-5) -9*a(n-6) +8*a(n-7) -5*a(n-8) +4*a(n-9) -3*a(n-10) +2*a(n-11) -a(n-12) for n>19.

EXAMPLE

Some solutions for n=4

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