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A280638
Number of odd divisors of Bell(n).
3
1, 1, 1, 2, 4, 2, 4, 2, 12, 16, 6, 8, 8, 2, 4, 8, 4, 10, 8, 12, 12, 16, 64, 8, 8, 64, 16, 64, 16, 16, 64, 4, 8, 4, 16, 48, 16, 8, 8, 8, 8, 16, 2, 128, 16, 32, 16, 64, 16, 4, 16, 8, 24, 16, 8, 2, 576, 8, 8, 16, 8, 128, 4, 128, 16, 8, 64, 8, 8, 16, 16
OFFSET
0,4
LINKS
FORMULA
a(n) = A001227(A000110(n)).
MATHEMATICA
Table[B=BellB[n]; r=IntegerExponent[B, 2]; DivisorSigma[0, B/2^r], {n, 0, 60}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Jan 07 2017
EXTENSIONS
Offset corrected by Amiram Eldar, Nov 23 2019
STATUS
approved