

A252919


Number of (2+2)X(n+2) 0..3 arrays with every consecutive three elements in every row having 2 or 3 distinct values, in every column 1 or 2 distinct values, in every diagonal 2 distinct values, and in every antidiagonal 2 distinct values, and new values 0 upwards introduced in row major order


1



5125, 52962, 566649, 6175841, 68396118, 754814607, 8344115340, 92323408351, 1021735293006, 11308017602699, 125180171364182, 1385716957726254, 15339892700716254, 169817995114956373, 1879945236822418013
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OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

Some solutions for n=2
..0..1..0..0....0..0..1..2....0..1..0..0....0..0..1..1....0..1..2..3
..0..2..0..0....2..2..1..2....1..0..2..2....0..2..1..0....0..1..0..0
..0..2..2..0....2..2..0..0....1..0..2..2....1..2..0..0....1..3..0..0
..0..2..0..3....1..2..0..0....2..3..1..0....1..3..0..2....0..1..3..1


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



