id:A003674 - OEIS Search Results

Search: id:A003674

Displaying 1-1 of 1 results found.

page 1

2^(n-1)*( 2^n - (-1)^n ).

+0
2

0, 3, 6, 36, 120, 528, 2016, 8256, 32640, 131328, 523776, 2098176, 8386560, 33558528, 134209536, 536887296, 2147450880, 8590000128, 34359607296, 137439215616, 549755289600, 2199024304128, 8796090925056 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`M. Gardner, Riddles of the Sphinx, New Mathematical Library, M.A.A., 1987, p. 145. Math. Rev. 89i:00015.`
	FORMULA	`G.f.: 3x/((1+2x)(1-4x)).`
	PROGRAM	`(PARI) a(n)=if(n<0, 0, 2^(n-1)*(2^n-(-1)^n))`
	CROSSREFS	`Adjacent sequences: A003671 A003672 A003673 this_sequence A003675 A003676 A003677` `Sequence in context: A084260 A076983 A068084 this_sequence A120595 A048642 A077532`
	KEYWORD	`nonn`
	AUTHOR	`njas`

page 1

Search completed in 0.002 seconds

Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

AT&T Labs Research