A203793 Number of (n+1)X6 0..3 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

268912, 25708528, 2700695728, 292394880208, 31960919852416, 3504288958063120, 384592800378103840, 42221697503213865232, 4635668075250677308048, 508981841189128273397536, 55885153963195016152757056

Offset

1,1

Comments

Column 5 of A203796

Links

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

Formula

Empirical: a(n) = 148*a(n-1) -3999*a(n-2) -35082*a(n-3) +1582335*a(n-4) -9332901*a(n-5) -26191026*a(n-6) +302396490*a(n-7) -400942710*a(n-8) -868046544*a(n-9) +1153030140*a(n-10) +438143580*a(n-11) -442158912*a(n-12)

Example

Some solutions for n=4
..3..1..3..3..0..0....2..0..1..3..2..0....1..3..2..3..1..3....2..1..0..3..3..3
..3..3..3..3..3..0....0..0..0..1..3..2....2..1..3..1..3..2....3..2..1..0..3..1
..1..3..0..3..3..3....3..0..3..0..1..3....0..2..1..3..3..3....3..3..2..1..0..3
..2..1..3..0..3..3....3..3..2..3..0..1....3..0..2..1..3..2....0..3..3..2..1..0
..2..2..1..3..3..2....3..0..3..0..3..0....2..3..0..2..1..3....1..0..3..3..2..1

Crossrefs

Sequence in context: A075466 A176384 A235821 * A231197 A061736 A124946

Adjacent sequences: A203790 A203791 A203792 * A203794 A203795 A203796

Keyword

nonn

Author

R. H. Hardin Jan 05 2012

Status

approved