A263055 Number of (n+1)X(3+1) 0..1 arrays with each row and column not divisible by 3, read as a binary number with top and left being the most significant bits.

10, 142, 1666, 18390, 188370, 1941702, 19499266, 196698070, 1968558130, 19732383462, 197355588066, 1974792933750, 19748600169490, 197518001324422, 1975194815632066, 19752765325169430, 197527991815422450

Offset

1,1

Comments

Column 3 of A263060.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 11*a(n-1) +35*a(n-2) -495*a(n-3) -114*a(n-4) +6204*a(n-5) -4040*a(n-6) -17600*a(n-7) +16000*a(n-8)

Example

Some solutions for n=4
..1..0..1..0....1..1..1..0....1..1..0..1....1..1..0..1....1..0..1..1
..1..1..0..1....0..1..1..1....0..0..1..0....0..0..0..1....0..1..0..1
..1..0..1..0....0..1..1..1....0..0..0..1....1..0..1..1....0..0..1..0
..0..0..1..0....0..0..0..1....1..0..1..0....1..0..0..0....1..1..0..1
..1..0..0..0....1..0..1..0....1..0..0..0....1..0..1..1....1..0..0..0

Crossrefs

Cf. A263060.

Sequence in context: A181162 A245988 A184710 * A159327 A356468 A276915

Adjacent sequences: A263052 A263053 A263054 * A263056 A263057 A263058

Keyword

nonn

Author

R. H. Hardin, Oct 08 2015

Status

approved