A195229 Number of lower triangles of an n X n 0..5 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less

6, 36, 428, 9982, 459880, 42029278, 7640055854, 2767861764930, 2001526172413328, 2892451174381411040, 8361331814456905846790, 48387254396810574882721328, 560941284568012233398098984786, 13033945031291662448750033149621602

Offset

1,1

Comments

Column 5 of A195232

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

Some solutions for n=4
..0........3........0........4........0........2........2........2
..1.1......4.4......1.0......4.4......1.1......1.1......1.2......3.2
..0.1.0....4.3.3....1.0.1....4.5.5....2.1.1....2.1.1....2.2.2....3.3.2
..1.0.1.0..4.4.3.3..1.1.1.2..4.4.5.5..2.1.1.1..2.1.1.2..3.3.2.1..2.3.2.2

Crossrefs

Sequence in context: A077704 A185085 A201540 * A366654 A367488 A339300

Adjacent sequences: A195226 A195227 A195228 * A195230 A195231 A195232

Keyword

nonn

Author

R. H. Hardin Sep 13 2011

Status

approved