A280589 - OEIS

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A280589

Sum of odd divisors of Bell(n).

3

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

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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