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A263909 Number of (2n+2)X(4+2) 0..1 arrays with each row and column modulo 3 equal to 1, read as a binary number with top and left being the most significant bits. 1
528, 320148, 151930944, 68226362100, 30224743053408, 13344339476900628, 5886544966626029184, 2596154092548752142900, 1144924797553613766288288, 504914149304802570026241108, 222667396652606197017189081024 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A263913 (nonzero terms).

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..105

FORMULA

Empirical: a(n) = 630*a(n-1) -94068*a(n-2) +4977882*a(n-3) -113131323*a(n-4) +1123558128*a(n-5) -3996751248*a(n-6)

EXAMPLE

Some solutions for n=2

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

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

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

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

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

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

CROSSREFS

Cf. A263913.

Sequence in context: A008690 A282292 A225834 * A233173 A233128 A233255

Adjacent sequences:  A263906 A263907 A263908 * A263910 A263911 A263912

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 29 2015

STATUS

approved

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Last modified November 23 21:51 EST 2020. Contains 338603 sequences. (Running on oeis4.)