A203875 Number of (n+1)X6 0..3 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order

39367, 10501975, 2801693287, 748675224487, 200096473566151, 53482170255256135, 14294949784964335495, 3820825310863126339495, 1021249636238740150452295, 272964825632097717303241351

Offset

1,1

Comments

Column 5 of A203878

Links

R. H. Hardin, Table of n, a(n) for n = 1..147

Formula

Empirical: a(n) = 304*a(n-1) -8430*a(n-2) -386764*a(n-3) +4486195*a(n-4) +17085516*a(n-5) -113413636*a(n-6) +92236816*a(n-7)

Example

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

Crossrefs

Sequence in context: A234033 A253940 A183833 * A252604 A340062 A031823

Adjacent sequences: A203872 A203873 A203874 * A203876 A203877 A203878

Keyword

nonn

Author

R. H. Hardin Jan 07 2012

Status

approved