OFFSET
1,3
EXAMPLE
a(6) = 585 is in the sequence because Fibonacci(6) = 8, and 1^3 + 2^3 + 4^3 + 8^3 = 585.
MATHEMATICA
Table[Plus@@(Transpose[DivisorSigma[3, Fibonacci[n]]][[1]]), {n, 30}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Lagneau, Oct 02 2010
STATUS
approved