id:A091957 - OEIS Search Results

Search: id:A091957

Displaying 1-1 of 1 results found.

page 1

A091957

a(1)=0, a(2)=1, a(n)=A000217(a(n-1)) + A000217(a(n-2)).

+0
1

0, 1, 1, 2, 4, 13, 101, 5242, 13747054, 94490767454888, 4464252567107002358694986701, 9964775491460730298984873909049635615687553262572198767 (list; graph; listen)

	OFFSET	`1,4`
	PROGRAM	`(PARI) t(n)=n*(n+1)/2 v=vector(12) v[2]=1 for (i=3, 12, v[i]=t(v[i-1])+t(v[i-2])) v`
	CROSSREFS	`Sequence in context: A132786 A103845 A055463 this_sequence A056678 A092665 A131758` `Adjacent sequences: A091954 A091955 A091956 this_sequence A091958 A091959 A091960`
	KEYWORD	`nonn`
	AUTHOR	`Jon Perry (perry(AT)globalnet.co.uk), Mar 13 2004`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research