A262817 Number of (n+3)X(3+3) 0..1 arrays with each row divisible by 9 and column not divisible by 9, read as a binary number with top and left being the most significant bits.

2744, 21952, 175616, 1442897, 11697083, 94196375, 753571000, 6028568000, 48228544000, 385987369041, 3088535151547, 24710826271383, 197686610171064, 1581492881368512, 12651943050948096, 101216195966457937

Offset

1,1

Comments

Column 3 of A262819.

Links

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

Formula

Empirical: a(n) = 12*a(n-1) -32*a(n-2) -64*a(n-3) +768*a(n-4) -2048*a(n-5) +65*a(n-6) -780*a(n-7) +2080*a(n-8) +4160*a(n-9) -49920*a(n-10) +133120*a(n-11) -64*a(n-12) +768*a(n-13) -2048*a(n-14) -4096*a(n-15) +49152*a(n-16) -131072*a(n-17)

Example

Some solutions for n=3
..0..1..0..0..1..0....0..1..1..0..1..1....0..1..0..0..1..0....0..1..0..0..1..0
..1..0..0..1..0..0....0..1..1..0..1..1....1..1..1..1..1..1....0..1..1..0..1..1
..1..1..1..1..1..1....1..1..0..1..1..0....1..1..1..1..1..1....1..1..1..1..1..1
..0..0..0..0..0..0....1..0..1..1..0..1....1..0..0..1..0..0....0..0..1..0..0..1
..1..1..0..1..1..0....1..1..0..1..1..0....0..0..1..0..0..1....1..1..1..1..1..1
..0..1..0..0..1..0....1..1..1..1..1..1....0..0..0..0..0..0....0..0..1..0..0..1

Crossrefs

Cf. A262819.

Sequence in context: A094497 A202460 A262820 * A250821 A250498 A180695

Adjacent sequences: A262814 A262815 A262816 * A262818 A262819 A262820

Keyword

nonn

Author

R. H. Hardin, Oct 03 2015

Status

approved