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A256947 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically 1
512, 13349, 319819, 2782301, 11818550, 27007866, 56306098, 109071370, 212009150, 385935286, 699340102, 1275550414, 2347054062, 4286793366, 7769996982, 14567381806, 27588495230, 52263269822, 98037946714, 189435993774 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A256954

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..31

EXAMPLE

Some solutions for n=2

..0..1..1..1....1..0..1..0....0..0..0..0....0..0..1..1....0..0..1..0

..0..1..1..0....1..1..0..0....1..1..0..1....0..0..1..1....0..0..0..0

..1..1..1..0....1..0..1..0....1..0..1..0....0..1..1..1....0..1..1..1

..1..0..0..0....1..0..1..0....1..0..1..0....1..0..0..0....1..0..1..1

CROSSREFS

Cf. A256954

Sequence in context: A254768 A254504 A253812 * A254720 A254252 A200791

Adjacent sequences:  A256944 A256945 A256946 * A256948 A256949 A256950

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 13 2015

STATUS

approved

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Last modified October 2 08:34 EDT 2022. Contains 357191 sequences. (Running on oeis4.)