id:A082472 - OEIS Search Results

Search: id:A082472

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a(1)=1, a(n)=sum(k=1,n-1,a(k)*2^k).

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1, 2, 10, 90, 1530, 50490, 3281850, 423358650, 108803173050, 55816027774650, 57211428469016250, 117226216933014296250, 480275810774559571736250, 3934899717675966571235096250, 64473331874120712269687052056250 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`n>=2 a(n+1)=(2^n+1)a(n); a(n) is asymptotic to c2^(n(n-1)/2) where c=prod(k>=1, 1+1/(22^k))=1.5894873526.....`
	CROSSREFS	`Cf. A005329.` `Sequence in context: A055779 A067550 A086587 this_sequence A095937 A108528 A108209` `Adjacent sequences: A082469 A082470 A082471 this_sequence A082473 A082474 A082475`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 27 2003`

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

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