id:A027742 - OEIS Search Results

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phi(4^n-1)/(2*n).

+0
1

1, 2, 6, 16, 60, 144, 756, 2048, 7776, 24000, 120032, 276480, 1719900, 4741632, 17820000, 67108864, 336849900, 725594112, 4822382628, 11842560000, 57802864896, 200778006528, 998132265920, 2283043553280 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Cf. A027695.` `Sequence in context: A073959 A006820 A131385 this_sequence A033301 A093113 A150030` `Adjacent sequences: A027739 A027740 A027741 this_sequence A027743 A027744 A027745`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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