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A254837 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally and vertically 1
512, 10550, 131776, 701614, 2423232, 8565304, 29838772, 111752868, 415464460, 1638156932, 6343755012, 25417337372, 100688300756, 405939128228, 1625723635116, 6570557207100, 26479623649484, 107227180621124 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254845

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..21

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A090007 A344305 A254797 * A254560 A257182 A288776

Adjacent sequences:  A254834 A254835 A254836 * A254838 A254839 A254840

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2015

STATUS

approved

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Last modified June 29 15:34 EDT 2022. Contains 354913 sequences. (Running on oeis4.)