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A216933 Number of side-n hexagonal 0..4 arrays with values nondecreasing E, SW and SE 1
5, 606, 175869, 64697626, 25604764159, 10284525151080, 4096557367365808, 1603120459023088062, 614279244262328965406, 230325185716748014038168, 84558986910490382000466700, 30431723356332792599455512216 (list; graph; refs; listen; history; text; internal format)
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

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Last modified January 29 08:01 EST 2023. Contains 359915 sequences. (Running on oeis4.)