A257266 Number of (n+2)X(1+2) 0..2 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum

9300, 119716, 1257600, 13089924, 121905264, 1125468304, 9711591328, 83266873600, 683489995584, 5585092358400, 44329493636352, 350732890002496, 2720435020545280, 21053754624774400, 160717099201132032

Offset

1,1

Comments

Column 1 of A257270

Links

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

R. H. Hardin, Empirical recurrence of order 48

Formula

Empirical recurrence of order 48 (see link above)

Example

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

Crossrefs

Cf. A257270

Sequence in context: A345852 A257270 A257385 * A257380 A183832 A200952

Adjacent sequences: A257263 A257264 A257265 * A257267 A257268 A257269

Keyword

nonn

Author

R. H. Hardin, Apr 19 2015

Status

approved