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A254797 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally 0
512, 10484, 133628, 1075560, 11392932, 96309005, 434785178, 3136187330, 30303543958, 234245367914, 877645445528, 6616981844884, 66980680958670, 530577573194491 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254804

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A247932 A090007 A344305 * A254837 A254560 A257182

Adjacent sequences:  A254794 A254795 A254796 * A254798 A254799 A254800

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2015

STATUS

approved

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Last modified September 17 22:42 EDT 2021. Contains 347489 sequences. (Running on oeis4.)