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Search: id:A099168
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A099168 3^n * 5^C(n,2). +0
1
1, 3, 45, 3375, 1265625, 2373046875, 22247314453125, 1042842864990234375, 244416296482086181640625, 286425347439944744110107421875, 1678273520155926235020160675048828125 (list; graph; listen)
OFFSET

0,2
LINKS

T. Eisenk\"olbl, 2-Enumerations of halved alternating sign matrices

CROSSREFS

Cf. A002416.

Adjacent sequences: A099165 A099166 A099167 this_sequence A099169 A099170 A099171

Sequence in context: A012833 A012747 A027637 this_sequence A004105 A060336 A057863

KEYWORD

nonn

AUTHOR

Ralf Stephan, Oct 09 2004

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.

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