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A254234 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally and vertically 0
512, 9209, 195528, 5606832, 68909819, 940766774, 9935634151, 77884261083, 876908175172, 7135292444845, 54154222470357, 571074987706539, 4540506562937008 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254242

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A253928 A254887 A256896 * A254546 A255028 A247932

Adjacent sequences:  A254231 A254232 A254233 * A254235 A254236 A254237

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 27 2015

STATUS

approved

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Last modified January 20 19:53 EST 2020. Contains 331096 sequences. (Running on oeis4.)