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A256896 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally and vertically 1
512, 9072, 202462, 2212280, 7212370, 20148566, 20860406, 59078346, 184212024, 632179718, 2314423502, 8727557690, 33524570530, 130212627960, 509112768360, 1998206331062, 7859885695566, 30956159700748, 122020341570654 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A256904

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Cf. A256904

Sequence in context: A017619 A253928 A254887 * A254234 A254546 A255028

Adjacent sequences:  A256893 A256894 A256895 * A256897 A256898 A256899

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 12 2015

STATUS

approved

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Last modified October 15 19:56 EDT 2021. Contains 348034 sequences. (Running on oeis4.)