A194614 Half the number of lower triangles of an (n+1)X(n+1) 0..7 array with no element equal to the average of its horizontal and vertical neighbors

184, 82057, 279618492, 7416076339907, 1525002446582690839, 2430369828996738172677912

Offset

1,1

Comments

Column 7 of A194615

Links

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

Example

Some solutions for 3X3
..6......0......5......0......2......1......4......7......6......4......0
..4.1....1.4....6.5....2.6....0.1....2.6....0.6....4.2....5.4....3.6....6.4
..1.6.5..7.5.2..4.0.5..1.5.7..0.6.2..4.3.1..0.6.4..0.6.3..3.7.6..1.2.7..1.7.6

Crossrefs

Sequence in context: A060491 A203843 A151586 * A232915 A139265 A243628

Adjacent sequences: A194611 A194612 A194613 * A194615 A194616 A194617

Keyword

nonn

Author

R. H. Hardin Aug 30 2011

Status

approved