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A194936
Number of lower triangles of a 7X7 0..n array with no element differing from any of its horizontal or vertical neighbors by more than one
1
268435456, 11761200209, 46128809462, 91397735301, 139323386328, 187700534197, 236134568314, 284573981453, 333013734808, 381453501205, 429893267858, 478333034513, 526772801168, 575212567823, 623652334478, 672092101133
OFFSET
1,1
COMMENTS
Row 7 of A194931
LINKS
FORMULA
Empirical: a(n) = 48439766655*n - 102944165347 for n>10
EXAMPLE
Some solutions for n=2
..1..............2..............2..............1..............0
..1.1............2.1............2.2............0.0............1.2
..2.2.1..........2.2.2..........1.2.2..........1.1.0..........2.1.1
..1.1.2.2........2.2.2.2........2.1.2.1........2.1.0.1........2.1.2.2
..2.1.1.2.1......1.1.1.2.1......2.1.1.0.0......1.1.1.1.2......1.1.2.1.0
..2.1.2.2.2.1....0.1.0.1.2.2....1.1.2.1.1.2....0.1.0.0.1.0....0.0.1.0.1.0
..1.2.2.2.1.0.1..0.0.1.1.1.2.2..0.1.2.2.2.1.1..0.0.0.1.2.1.0..0.0.1.1.0.0.1
CROSSREFS
Sequence in context: A223605 A223698 A195237 * A195253 A122969 A137492
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 05 2011
STATUS
approved