A194502 Number of lower triangles of an n X n 0..5 array with each element unequal to the sum mod 6 of its horizontal and vertical neighbors

5, 125, 15804, 9765630, 30517578125, 476837158203125, 37252902986083985625

Offset

1,1

Comments

Column 5 of A194505

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for 3X3
..2......2......5......4......1......4......0......1......1......1......5
..3.2....1.0....0.1....3.3....0.0....2.1....3.1....2.5....3.4....3.1....3.5
..3.2.1..2.3.0..1.4.3..1.1.5..0.5.3..2.3.2..1.5.1..4.5.4..1.3.1..3.1.0..1.1.4

Crossrefs

Sequence in context: A202628 A358110 A109345 * A229868 A201839 A234609

Adjacent sequences: A194499 A194500 A194501 * A194503 A194504 A194505

Keyword

nonn

Author

R. H. Hardin Aug 27 2011

Status

approved