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A186587 Number of (n+3)X10 0..2 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock 1
2296065, 98893, 156259, 335737, 635779, 823249, 855715, 895753, 1034611, 1222033, 1448491, 1784617, 2851075, 4154593, 5572123, 7289065, 11483715, 16527329, 22251883, 29247513, 43331475, 61720401, 84306267, 112868169, 163996035 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A186589

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..70

FORMULA

Empirical: a(n)=2*a(n-1)-a(n-2)+2*a(n-4)-4*a(n-5)+2*a(n-6)+2*a(n-8)-2*a(n-9) for n>17

EXAMPLE

Some solutions for 5X10

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

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

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

..2..0..0..0..0..0..0..0..0..0....2..0..0..0..0..0..0..0..0..0

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

CROSSREFS

Sequence in context: A238079 A209958 A324637 * A252395 A256733 A210493

Adjacent sequences:  A186584 A186585 A186586 * A186588 A186589 A186590

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 24 2011

STATUS

approved

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Last modified July 2 16:36 EDT 2022. Contains 355029 sequences. (Running on oeis4.)