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A254846 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum one and no antidiagonal sum two 1
192, 1369, 5904, 37636, 296800, 3316041, 50676440, 827137600, 14800497228, 375688088356, 12300608282796, 537256027718656, 31510169714238336, 2195764633971767824, 171957812290330672116, 18426406279700831356816 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A254854

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A205761 A133064 A183685 * A051526 A188786 A251442

Adjacent sequences:  A254843 A254844 A254845 * A254847 A254848 A254849

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2015

STATUS

approved

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Last modified May 31 09:30 EDT 2020. Contains 334748 sequences. (Running on oeis4.)