A194928 Number of lower triangles of an n X n 0..5 array with no element differing from any of its horizontal or vertical neighbors by more than one

6, 44, 728, 26316, 2089736, 364130672, 139323386328, 117075649276412, 216113470259526948, 876452156097264185188, 7810016810149997712089700, 152927733637636192107728580088, 6580461097392848372314889891440304

Offset

1,1

Comments

Column 5 of A194931

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

Some solutions for 4X4
..3........2........1........4........5........4........3........2
..4.4......1.2......2.1......3.2......4.4......5.4......4.3......1.1
..4.3.2....1.1.0....3.2.2....3.2.3....5.5.5....4.3.3....3.3.2....0.1.0
..3.2.1.1..1.0.0.0..2.1.1.1..3.3.3.2..4.4.4.3..4.3.4.5..4.3.3.4..1.0.0.0

Crossrefs

Sequence in context: A352843 A284218 A295978 * A267074 A271963 A065783

Adjacent sequences: A194925 A194926 A194927 * A194929 A194930 A194931

Keyword

nonn

Author

R. H. Hardin Sep 05 2011

Status

approved