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A254805 Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
2700, 10484, 40167, 121701, 426308, 1351487, 4771368, 16058526, 56235160, 192884364, 669557257, 2305588750, 7958763182, 27396735121, 94312947300, 324414828833, 1115586299491, 3835775446691, 13186270802164, 45332896612376 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A254804

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A115930 A109994 A322525 * A254798 A253814 A054561

Adjacent sequences: A254802 A254803 A254804 * A254806 A254807 A254808

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2015

STATUS

approved

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Last modified February 1 05:08 EST 2023. Contains 359981 sequences. (Running on oeis4.)