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A194501 Number of lower triangles of an nXn 0..4 array with each element unequal to the sum mod 5 of its horizontal and vertical neighbors 0
4, 64, 4160, 1048560, 1073741824, 4398046511104, 72057594037927936 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A194505

LINKS

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

EXAMPLE

Some solutions for 3X3

..0......1......3......1......0......1......2......2......4......1......0

..2.0....0.3....2.4....0.2....1.0....4.0....4.2....0.4....2.3....2.2....3.4

..4.1.4..2.4.0..1.1.4..1.4.2..0.3.1..0.0.2..3.1.2..2.0.1..3.4.0..3.3.4..3.2.4

CROSSREFS

Sequence in context: A053763 A193611 A193755 * A053923 A211214 A229867

Adjacent sequences:  A194498 A194499 A194500 * A194502 A194503 A194504

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 27 2011

STATUS

approved

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Last modified October 31 03:51 EDT 2014. Contains 248845 sequences.