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

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

R. H. Hardin, Table of n, a(n) for n = 1..200

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

Adjacent sequences: A194933 A194934 A194935 * A194937 A194938 A194939

Keyword

nonn

Author

R. H. Hardin Sep 05 2011

Status

approved