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A252289 Number of (n+2)X(4+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 or 4 1
5910, 8636, 20558, 68320, 254401, 1012183, 4209322, 17769366, 75470425, 321306676, 1369472043, 5841029470, 24919280843, 106316764110, 453616602660, 1935494108299, 8258474145347, 35237860179533, 150356116419137 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A252293

LINKS

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

EXAMPLE

Some solutions for n=4

..0..2..1..0..2..0....2..2..1..2..2..2....1..1..1..1..1..1....2..2..2..2..1..2

..2..1..0..2..1..0....1..2..2..2..2..2....0..1..1..1..0..1....2..2..2..2..2..2

..1..2..2..1..2..2....2..1..2..2..2..2....1..1..1..1..1..1....2..2..2..1..2..2

..0..2..1..0..2..1....2..2..1..2..2..2....1..0..1..1..1..1....1..2..2..2..2..1

..2..1..0..2..1..0....1..2..2..1..2..2....1..1..1..1..0..1....2..2..1..2..2..2

..1..2..2..1..0..2....0..1..2..2..1..2....1..1..1..1..1..1....2..2..2..2..2..2

CROSSREFS

Sequence in context: A209431 A163209 A216942 * A284980 A251464 A031575

Adjacent sequences:  A252286 A252287 A252288 * A252290 A252291 A252292

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 16 2014

STATUS

approved

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Last modified November 21 04:22 EST 2019. Contains 329350 sequences. (Running on oeis4.)