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A087424 a(n)=S(4*n,4)/S(n,4) where S(n,m)=sum(k=0,n,binomial(n,k)*fibonacci(m*k)). 0
567, 239841, 114082668, 55125843489, 26697877691247, 12934267027240356, 6266540498895923463, 3036106030479071781249, 1470978970343729016987852, 712682440446248640284336721, 345291321126117622870522555983 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

a(n)=(243+108*sqrt(5))^n+(243-108*sqrt(5))^n+((81+27*sqrt(5))/2)^n+((81-27*sqrt(5))/2)^n

CROSSREFS

Cf. A020876.

Sequence in context: A005953 A051372 A023099 * A134922 A184682 A192822

Adjacent sequences:  A087421 A087422 A087423 * A087425 A087426 A087427

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 22 2003

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Last modified February 17 02:08 EST 2012. Contains 205978 sequences.