A157253 - OEIS

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A157253

Arises in combinatorial approach to the power of 2 in the number of involutions.

1, 1, 1, 2, 2, 6, 8, 26 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	COMMENTS	`Table 1 of Kim and Kim. Is it pure coincidence that this is so similar to A079494 and is a subsequence of A003178?`
	LINKS	`Dongsu Kim, Jang Soo Kim, A combinatorial approach to the power of 2 in the number of involutions, Feb 25, 2009.`
	CROSSREFS	`Sequence in context: A129383 A052957 A197465 * A074933 A003178 A079494` `Adjacent sequences: A157250 A157251 A157252 * A157254 A157255 A157256`
	KEYWORD	`nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Feb 25 2009`

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Last modified February 14 01:35 EST 2012. Contains 205567 sequences.