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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 1
6, 44, 728, 26316, 2089736, 364130672, 139323386328, 117075649276412, 216113470259526948, 876452156097264185188, 7810016810149997712089700, 152927733637636192107728580088, 6580461097392848372314889891440304 (list; graph; refs; listen; history; text; internal format)
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: A001852 A284218 A295978 * A267074 A271963 A065783

Adjacent sequences:  A194925 A194926 A194927 * A194929 A194930 A194931

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 05 2011

STATUS

approved

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Last modified November 24 04:08 EST 2020. Contains 338607 sequences. (Running on oeis4.)