A251918 Number of (n+2)X(3+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

2524, 4624, 6086, 10820, 27366, 59760, 153792, 424648, 1188644, 3247774, 9831616, 27631982, 83818706, 238563390, 729213256, 2076327410, 6367943136, 18160895004, 55719714944, 159044646208, 488184738886, 1393489632448, 4278578773162

Offset

1,1

Comments

Column 3 of A251923

Links

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

R. H. Hardin, Empirical recurrence of order 73

Formula

Empirical recurrence of order 73 (see link above)

Example

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

Crossrefs

Sequence in context: A308736 A031984 A045213 * A111729 A252288 A373704

Adjacent sequences: A251915 A251916 A251917 * A251919 A251920 A251921

Keyword

nonn

Author

R. H. Hardin, Dec 11 2014

Status

approved