id:A127850 - OEIS Search Results

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a(n)=(2^n-1)*2^(n(n-1)/2)/(2^(n-1)).

+0
3

0, 1, 3, 14, 120, 1984, 64512, 4161536, 534773760, 137170518016, 70300024700928, 72022409665839104, 147537923792657448960, 604389122831019749146624, 4951457925686617442302820352 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`To base 2, this is given by A127851.`
	FORMULA	`a(n)=2^C(n,2)*(2^n-1)/2^(n-1)`
	CROSSREFS	`Sequence in context: A007140 A122081 A161936 this_sequence A061029 A096657 A126933` `Adjacent sequences: A127847 A127848 A127849 this_sequence A127851 A127852 A127853`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 02 2007`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research