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A254546 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally 0
512, 9292, 129677, 1193965, 8246808, 64180262, 479026957, 2511052025, 21188684994, 181128766926, 982298722361, 8581995931854, 74325711093901, 405810151566882, 3553109063296745 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254553

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A254887 A256896 A254234 * A255028 A247932 A090007

Adjacent sequences:  A254543 A254544 A254545 * A254547 A254548 A254549

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2015

STATUS

approved

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Last modified September 25 20:01 EDT 2021. Contains 347659 sequences. (Running on oeis4.)