A216936 Number of side-n hexagonal 0..7 arrays with values nondecreasing E, SW and SE

8, 7656, 46978360, 609829326268, 11433160307353408, 260484745143941231864, 6599849499864661350027328

Offset

1,1

Comments

Column 7 of A216937

Links

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

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
....0.0.0.0.2......0.0.0.2.5......0.0.0.2.5......0.0.0.2.3......0.0.0.1.4
.....0.0.0.2........1.2.3.6........4.5.5.7........0.1.4.5........4.5.6.6
......2.6.6..........2.5.6..........5.7.7..........3.5.5..........5.6.6

Crossrefs

Sequence in context: A356083 A278854 A115442 * A090494 A079656 A114773

Adjacent sequences: A216933 A216934 A216935 * A216937 A216938 A216939

Keyword

nonn

Author

R. H. Hardin Sep 20 2012

Status

approved