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A257431 Number of (6+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
514920, 1293242, 3917190, 13233402, 36423140, 115919394, 356678661, 1013024839, 2950063325, 8706010338, 24924494772, 71250809523, 201815907569, 564593588950, 1576308803788, 4393237742809, 12206840093658, 33862403008984 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A257426

LINKS

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

EXAMPLE

Some solutions for n=1

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

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

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

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

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

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

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

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

CROSSREFS

Cf. A257426

Sequence in context: A306952 A329461 A257424 * A254240 A087096 A072959

Adjacent sequences:  A257428 A257429 A257430 * A257432 A257433 A257434

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 22 2015

STATUS

approved

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Last modified February 27 03:50 EST 2020. Contains 332299 sequences. (Running on oeis4.)