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A186592 Number of (n+3)X5 0..3 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock 1
48243, 2703, 8853, 104547, 444066, 884466, 1126074, 1184226, 1210122, 1236594, 1282434, 1586349, 2884656, 5616483, 9131238, 13594674, 21118974, 33023250, 47413830, 65562198, 96788079, 149349369, 219913836, 315141975, 472175553 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A186599

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..159

FORMULA

Empirical: a(n)=2*a(n-1)-a(n-2)+3*a(n-4)-6*a(n-5)+3*a(n-6)+3*a(n-8)-3*a(n-9) for n>14

EXAMPLE

Some solutions for 7X5

..0..0..2..0..3....0..0..2..3..2....0..0..0..3..3....0..0..0..2..3

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

..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0

..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0

..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0

..1..1..0..0..0....2..0..0..0..0....3..0..0..0..0....0..0..0..0..0

..0..3..0..0..0....0..3..0..0..0....2..1..0..0..0....3..2..1..0..0

CROSSREFS

Sequence in context: A254771 A254778 A254724 * A221556 A227701 A253494

Adjacent sequences:  A186589 A186590 A186591 * A186593 A186594 A186595

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 24 2011

STATUS

approved

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Last modified January 17 06:12 EST 2022. Contains 350378 sequences. (Running on oeis4.)