A280589 Sum of odd divisors of Bell(n).

1, 1, 1, 6, 24, 14, 240, 878, 1872, 34560, 143840, 542880, 4421376, 27644438, 97250652, 1666163520, 10523628456, 30946448412, 779556556800, 5873176163328, 15288823623792, 633207380826720, 6399554302310400, 22325251164046200, 594616643557427040, 5146116019164933120

Offset

0,4

Links

Amiram Eldar, Table of n, a(n) for n = 0..104 (terms 1..70 from Vincenzo Librandi)

Formula

a(n) = A000593(A000110(n)).

Mathematica

a[n_]:=Select[Divisors[BellB[n]], OddQ]//Total; Table[a[n], {n, 0, 40}]

Crossrefs

Cf. A000110, A000593, A280638.

Sequence in context: A029592 A112034 A327568 * A298038 A223751 A228745

Adjacent sequences: A280586 A280587 A280588 * A280590 A280591 A280592

Keyword

nonn

Author

Vincenzo Librandi, Jan 07 2017

Extensions

Offset 0 and a(0) added by Amiram Eldar, Nov 23 2019

Status

approved