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A186567 Number of (n+2)X10 0..2 arrays with every 3X3 subblock commuting with each horizontal and vertical neighbor 3X3 subblock 1
35198, 4795, 8029, 18415, 33445, 44887, 60973, 82783, 112357, 168727, 255085, 381007, 587317, 891271, 1333501, 2082015, 3198533, 4843447, 7513549, 11527567, 17482837, 26985511, 41409053, 63004927, 97035813, 148936471, 227092333 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 8 of A186568

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..163

FORMULA

Empirical: a(n)=2*a(n-1)-a(n-2)+2*a(n-3)-4*a(n-4)+2*a(n-5)+2*a(n-6)-2*a(n-7) for n>16

EXAMPLE

Some solutions for 4X10

..0..0..2..0..0..0..0..0..0..2....1..0..0..1..0..0..2..0..0..1

..0..0..0..2..0..0..0..0..0..1....0..1..0..0..1..0..0..2..0..0

..0..0..0..0..2..0..0..0..0..0....0..0..1..0..0..1..0..0..2..0

..0..0..0..0..0..2..0..0..0..0....2..0..0..1..0..0..1..0..0..2

CROSSREFS

Sequence in context: A204491 A085545 A031855 * A235279 A133282 A257724

Adjacent sequences:  A186564 A186565 A186566 * A186568 A186569 A186570

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 2011

STATUS

approved

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Last modified December 3 19:39 EST 2021. Contains 349468 sequences. (Running on oeis4.)