A260622 a(n) is the sum of the positive divisors of A003266(n).

1, 1, 3, 12, 72, 744, 10416, 270816, 9906624, 614210688, 55278961920, 8354817757440, 1955027355240960, 766650012876633600, 478623425047744204800, 492420437498707277414400, 786887859122934229308211200, 2148247421904894243053912064000

Offset

1,3

Links

Amiram Eldar, Table of n, a(n) for n = 1..98

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

Cf. A000203, A003266, A272122.

Sequence in context: A052676 A054640 A139486 * A348222 A346664 A060906

Adjacent sequences: A260619 A260620 A260621 * A260623 A260624 A260625

Keyword

nonn

Author

Altug Alkan, Apr 30 2016

Status

approved