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A186585 Number of (n+3)X8 0..2 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock 1
805791, 42313, 115699, 293665, 569947, 626233, 635779, 645937, 662467, 701065, 850195, 1094737, 1785355, 2632681, 4196451, 5971361, 8671483, 11762217, 16584099, 22317345, 31282251, 42723033, 60753651, 84156817, 119423547 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A186589

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..95

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>15

EXAMPLE

Some solutions for 5X8

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

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

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

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

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

CROSSREFS

Sequence in context: A224657 A214148 A272692 * A270117 A178290 A083617

Adjacent sequences:  A186582 A186583 A186584 * A186586 A186587 A186588

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 24 2011

STATUS

approved

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Last modified August 12 07:45 EDT 2022. Contains 356067 sequences. (Running on oeis4.)