A216935 Number of side-n hexagonal 0..6 arrays with values nondecreasing E, SW and SE

7, 3630, 8737047, 37112483200, 203889639856012, 1268055011723293820, 8365565750024647646080, 56569600402907949778157548, 384772088547650348500010268365

Offset

1,1

Comments

Column 6 of A216937

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=3
......0.0.0..........0.0.0..........0.0.0..........0.0.0..........0.0.0
.....0.0.0.0........0.0.0.0........0.0.0.0........0.0.0.0........0.0.0.0
....0.0.2.3.4......0.0.0.2.4......0.0.0.4.5......0.0.3.3.3......0.0.0.1.1
.....0.2.5.5........2.2.2.6........0.0.5.5........0.3.4.6........0.0.3.3
......4.5.5..........3.4.6..........6.6.6..........5.5.6..........5.6.6

Crossrefs

Sequence in context: A350018 A055307 A052496 * A024100 A069644 A203679

Adjacent sequences: A216932 A216933 A216934 * A216936 A216937 A216938

Keyword

nonn

Author

R. H. Hardin Sep 20 2012

Status

approved