A099168 - OEIS

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A099168

3^n * 5^C(n,2).

1, 3, 45, 3375, 1265625, 2373046875, 22247314453125, 1042842864990234375, 244416296482086181640625, 286425347439944744110107421875, 1678273520155926235020160675048828125 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`T. Eisenk\"olbl, 2-Enumerations of halved alternating sign matrices`
	CROSSREFS	`Cf. A002416.` `Sequence in context: A012833 A012747 A027637 * A004105 A060336 A057863` `Adjacent sequences: A099165 A099166 A099167 * A099169 A099170 A099171`
	KEYWORD	`nonn`
	AUTHOR	`Ralf Stephan, Oct 09 2004`

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Last modified February 17 06:27 EST 2012. Contains 205998 sequences.