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A252393
Number of (n+2)X(2+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4
1
21544, 437023, 9807871, 203636149, 4246242886, 89843675557, 1892602521123, 39809382457721, 838416758796711, 17657051023542125, 371771844206074736, 7828257407198464484, 164840943826619948011, 3471012673803505488234
OFFSET
1,1
COMMENTS
Column 2 of A252397
LINKS
EXAMPLE
Some solutions for n=1
..1..0..1..0....0..0..0..2....1..1..0..1....1..0..1..0....1..2..0..0
..2..1..0..1....0..1..0..0....0..0..0..1....0..2..1..0....0..0..1..1
..0..0..0..1....0..0..1..0....0..2..0..0....0..1..0..2....2..0..0..0
CROSSREFS
Sequence in context: A096554 A295994 A063388 * A211236 A221002 A190470
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved