A203792 Number of (n+1)X5 0..3 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

38416, 1911952, 101071600, 5426653360, 292394880208, 15768587718160, 850544485943152, 45880025360206384, 2474880694628072272, 133501541652044308624, 7201425164076337197808, 388463950220945824301488

Offset

1,1

Comments

Column 4 of A203796

Links

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

Formula

Empirical: a(n) = 49*a(n-1) +543*a(n-2) -15435*a(n-3) +26244*a(n-4) +117288*a(n-5) -79704*a(n-6) -46656*a(n-7)

Example

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

Crossrefs

Sequence in context: A050777 A050765 A254852 * A013873 A050766 A250712

Adjacent sequences: A203789 A203790 A203791 * A203793 A203794 A203795

Keyword

nonn

Author

R. H. Hardin Jan 05 2012

Status

approved