A251919 Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7

3260, 4938, 10820, 25882, 80438, 253148, 856022, 3063064, 10885914, 39035588, 141641316, 513510222, 1860892000, 6752701006, 24520021374, 89037718964, 323273690688, 1173779249448, 4262540743302, 15479263400324, 56209300530872

Offset

1,1

Comments

Column 4 of A251923

Links

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

R. H. Hardin, Empirical recurrence of order 69

Formula

Empirical recurrence of order 69 (see link above)

Example

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

Crossrefs

Sequence in context: A043606 A135134 A137836 * A338071 A234653 A254492

Adjacent sequences: A251916 A251917 A251918 * A251920 A251921 A251922

Keyword

nonn

Author

R. H. Hardin, Dec 11 2014

Status

approved