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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
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
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Jan 07 2017
EXTENSIONS
Offset 0 and a(0) added by Amiram Eldar, Nov 23 2019
STATUS
approved