The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A257419 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A257419

Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally
(history; published version)

#4 by R. H. Hardin at Wed Apr 22 10:36:41 EDT 2015

STATUS

editing

approved

#3 by R. H. Hardin at Wed Apr 22 10:36:36 EDT 2015

NAME

allocated for R. H. Hardin

Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally

DATA

512, 7652, 117324, 1770206, 12316842, 115919394, 1037269100, 6191314193, 57799643410, 478127487069, 2903676329504, 27615631745955, 219195987569254, 1325497215293808

OFFSET

1,1

COMMENTS

Diagonal of A257426

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Cf. A257426

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin, Apr 22 2015

STATUS

approved

editing

#2 by R. H. Hardin at Wed Apr 22 10:35:01 EDT 2015

KEYWORD

allocating

allocated

#1 by R. H. Hardin at Wed Apr 22 10:35:01 EDT 2015

NAME

allocated for R. H. Hardin

KEYWORD

allocating

STATUS

approved