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A195228
Number of lower triangles of an n X n 0..4 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less
1
5, 29, 337, 7705, 348849, 31374671, 5618308863, 2006626824777, 1431393426377379, 2041526404394580503, 5826929219460553056125, 33306813274969071019847237, 381509343842237775318179191165, 8761682347863104757428803661222769
OFFSET
1,1
COMMENTS
Column 4 of A195232
LINKS
EXAMPLE
Some solutions for n=4
..1........1........2........2........3........0........3........1
..2.1......2.1......1.2......1.1......3.2......0.0......4.4......1.2
..1.2.2....1.1.1....2.1.2....1.1.0....2.2.2....0.1.0....4.4.3....2.2.2
..1.1.2.3..1.0.1.2..1.2.1.2..1.0.1.1..2.2.3.2..0.1.1.1..4.4.4.3..1.1.2.2
CROSSREFS
Sequence in context: A332469 A112799 A020531 * A226668 A226666 A366411
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 13 2011
STATUS
approved