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A195243 Number of lower triangles of an n X n 0..3 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less 1
4, 46, 1682, 190514, 67379894, 74236765958, 254948725307650, 2728873272983950594, 91038149737139587502854, 9466106148769015848820814134, 3067809430979519600024270636572850 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A195248
LINKS
EXAMPLE
Some solutions for n=5
..1..........2..........1..........3..........0..........1..........0
..0.2........2.1........0.2........1.1........2.1........1.3........2.1
..2.0.2......2.0.0......2.1.3......1.1.2......0.2.2......3.3.1......0.2.2
..0.0.1.3....2.1.1.2....0.2.1.3....3.2.1.1....2.1.1.0....3.1.1.3....2.1.1.0
..0.1.2.3.3..1.2.2.1.0..2.1.3.3.3..2.1.2.2.3..1.0.0.1.2..2.3.2.2.1..1.0.0.1.2
CROSSREFS
Sequence in context: A002077 A113096 A135078 * A269005 A107766 A065777
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 13 2011
STATUS
approved

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Last modified April 14 18:28 EDT 2024. Contains 371667 sequences. (Running on oeis4.)