A216933 Number of side-n hexagonal 0..4 arrays with values nondecreasing E, SW and SE

5, 606, 175869, 64697626, 25604764159, 10284525151080, 4096557367365808, 1603120459023088062, 614279244262328965406, 230325185716748014038168, 84558986910490382000466700, 30431723356332792599455512216

Offset

1,1

Comments

Column 4 of A216937

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

Some solutions for n=3
......0.0.1..........0.0.0..........0.0.0..........0.0.0..........0.0.0
.....0.1.1.3........0.1.1.2........0.0.0.1........0.0.1.1........0.0.1.1
....0.1.1.3.3......1.1.2.3.3......0.1.1.4.4......0.0.1.1.4......1.1.1.1.2
.....1.2.3.4........2.2.4.4........2.2.4.4........0.3.4.4........2.2.3.4
......3.3.4..........2.4.4..........2.4.4..........3.4.4..........3.4.4

Crossrefs

Sequence in context: A299463 A300106 A283098 * A274704 A013736 A209589

Adjacent sequences: A216930 A216931 A216932 * A216934 A216935 A216936

Keyword

nonn

Author

R. H. Hardin Sep 20 2012

Status

approved