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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

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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: A054640 A377673 A139486 * A348222 A346664 A060906

Adjacent sequences: A260619 A260620 A260621 * A260623 A260624 A260625

KEYWORD

nonn

AUTHOR

Altug Alkan, Apr 30 2016

STATUS

approved

URL: https://oeis.org/A260622

⇱ A260622 - OEIS