A263911 Number of (2n+2)X(6+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.

14112, 151930944, 1207439092800, 8931773538545760, 64912419951251558112, 469681539356696362061184, 3394695595287389879796831360, 24528928458505093713931796169120, 177225579074112141647653163414682912

Offset

1,1

Comments

Column 6 of A263913 (nonzero terms).

Links

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

Formula

Empirical: a(n) = 10251*a(n-1) -24588630*a(n-2) +20736364566*a(n-3) -7717648620717*a(n-4) +1351575968338575*a(n-5) -117364027613333052*a(n-6) +5003728803610496208*a(n-7) -96662904808142088000*a(n-8) +665549276803016320000*a(n-9)

Example

Some solutions for n=1
..1..1..0..0..0..1..1..1....0..0..0..0..0..1..0..0....0..0..0..1..0..0..0..0
..0..1..1..1..1..0..0..1....1..0..0..0..1..1..1..0....0..0..1..1..0..0..0..1
..1..0..0..0..1..1..1..0....1..0..0..0..0..0..1..0....0..0..0..0..0..0..0..1
..0..1..0..0..1..0..0..1....1..1..1..1..0..1..1..1....1..1..0..1..1..1..1..1

Crossrefs

Cf. A263913.

Sequence in context: A035918 A157786 A186834 * A215019 A206845 A206837

Adjacent sequences: A263908 A263909 A263910 * A263912 A263913 A263914

Keyword

nonn

Author

R. H. Hardin, Oct 29 2015

Status

approved