A257380 Number of (n+2)X(1+2) 0..2 arrays with no 3x3 subblock diagonal sum equal to the antidiagonal sum or central row sum less than the central column sum

9300, 119716, 1719620, 24720784, 349003536, 4925793856, 69733153264, 987300576900, 13970047948904, 197664647574276, 2797189028575200, 39584116251965476, 560147800897976784, 7926510787173264784

Offset

1,1

Comments

Column 1 of A257385

Links

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

R. H. Hardin, Empirical recurrence of order 81

Formula

Empirical recurrence of order 81 (see link above)

Example

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

Crossrefs

Cf. A257385

Sequence in context: A257270 A257385 A257266 * A183832 A200952 A252205

Adjacent sequences: A257377 A257378 A257379 * A257381 A257382 A257383

Keyword

nonn

Author

R. H. Hardin, Apr 21 2015

Status

approved