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A252119 Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 6 1
1091710, 83930022, 6987308056, 542424609174, 42424000928232, 3354373190670870, 264082244572771202, 20776853270332111512, 1636217390178243794314, 128835278036010926319248 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A252121

LINKS

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

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A253467 A258704 A224592 * A109148 A077647 A172647

Adjacent sequences:  A252116 A252117 A252118 * A252120 A252121 A252122

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 14 2014

STATUS

approved

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Last modified June 17 17:05 EDT 2019. Contains 324196 sequences. (Running on oeis4.)