id:A087424 - OEIS Search Results

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a(n)=S(4*n,4)/S(n,4) where S(n,m)=sum(k=0,n,binomial(n,k)*fibonacci(m*k)).

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567, 239841, 114082668, 55125843489, 26697877691247, 12934267027240356, 6266540498895923463, 3036106030479071781249, 1470978970343729016987852, 712682440446248640284336721, 345291321126117622870522555983 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n)=(243+108sqrt(5))^n+(243-108sqrt(5))^n+((81+27sqrt(5))/2)^n+((81-27sqrt(5))/2)^n`
	CROSSREFS	`Cf. A020876.` `Sequence in context: A005953 A051372 A023099 this_sequence A134922 A142818 A103818` `Adjacent sequences: A087421 A087422 A087423 this_sequence A087425 A087426 A087427`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 22 2003`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research