A216934 Number of side-n hexagonal 0..5 arrays with values nondecreasing E, SW and SE

6, 1572, 1374208, 1783839948, 2711219461532, 4389382785819252, 7251826449700700016, 11974982327518714139584, 19562098569257627523741964, 31456058103183393532138318824

Offset

1,1

Comments

Column 5 of A216937

Links

Table of n, a(n) for n=1..10.

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........0.0.0.3........0.0.0.1........0.0.0.1........0.0.0.3
....0.0.1.1.2......0.0.2.3.3......0.0.0.1.4......0.1.2.2.3......0.1.1.4.5
.....0.2.4.5........3.3.3.5........1.1.3.5........3.3.3.3........1.3.4.5
......2.5.5..........4.5.5..........1.4.5..........3.4.4..........3.4.5

Crossrefs

Sequence in context: A131453 A265862 A281255 * A308029 A160226 A209609

Adjacent sequences: A216931 A216932 A216933 * A216935 A216936 A216937

Keyword

nonn

Author

R. H. Hardin Sep 20 2012

Status

approved