A194613 Half the number of lower triangles of an (n+1)X(n+1) 0..6 array with no element equal to the average of its horizontal and vertical neighbors

117, 34247, 66369488, 873084601728, 77572756670578163, 46519509694797259637061

Offset

1,1

Comments

Column 6 of A194615

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 3X3
..3......6......3......1......3......5......1......4......1......4......6
..1.2....1.2....4.4....6.0....2.3....2.5....0.5....3.1....5.0....5.4....5.4
..2.0.6..1.4.5..3.5.2..0.5.1..1.3.0..2.4.1..6.0.2..2.4.5..5.6.4..6.6.4..0.1.2

Crossrefs

Sequence in context: A027511 A203626 A220600 * A079196 A113798 A151593

Adjacent sequences: A194610 A194611 A194612 * A194614 A194615 A194616

Keyword

nonn

Author

R. H. Hardin Aug 30 2011

Status

approved