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A252624 Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 3 6 or 8 1
17704, 78710, 585774, 5013608, 45094726, 410194726, 3747351702, 34254637480, 313184238226, 2863795168360, 26186917115912, 239459836941634, 2189681762603196, 20023020430936170, 183095883696544566 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A252628

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..204

EXAMPLE

Some solutions for n=2

..2..0..2..3....3..1..0..1....2..2..3..2....0..3..2..0....3..1..3..1

..0..0..2..0....3..1..3..3....0..2..2..0....0..0..2..2....1..3..3..3

..2..0..0..2....1..3..1..1....2..0..0..0....0..2..0..0....1..3..3..3

..0..2..0..0....1..3..1..3....0..0..0..0....0..2..0..2....3..3..3..3

CROSSREFS

Sequence in context: A137878 A165598 A187641 * A252513 A328868 A322552

Adjacent sequences:  A252621 A252622 A252623 * A252625 A252626 A252627

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 19 2014

STATUS

approved

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Last modified January 24 16:44 EST 2021. Contains 340411 sequences. (Running on oeis4.)