login
A260622
a(n) is the sum of the positive divisors of A003266(n).
2
1, 1, 3, 12, 72, 744, 10416, 270816, 9906624, 614210688, 55278961920, 8354817757440, 1955027355240960, 766650012876633600, 478623425047744204800, 492420437498707277414400, 786887859122934229308211200, 2148247421904894243053912064000
OFFSET
1,3
LINKS
FORMULA
a(n) = A000203(A003266(n)).
MATHEMATICA
a[n_] := DivisorSigma[1, Fibonorial[n]]; Array[a, 18] (* Amiram Eldar, Aug 09 2022 *)
PROG
(PARI) a(n) = sigma(prod(k=1, n, fibonacci(k)));
CROSSREFS
KEYWORD
nonn
AUTHOR
Altug Alkan, Apr 30 2016
STATUS
approved