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A227840 3^a(n) is the highest power of 3 dividing A000110(n). 2
0, 0, 0, 0, 1, 0, 0, 0, 2, 1, 0, 1, 0, 0, 0, 0, 0, 4, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 3, 1, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 1, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,9
COMMENTS
This is the 3-adic valuation of the Bell numbers A000110.
The 2-adic valuation is less interesting: 0, 0, 1, 0, 0, 2, 0, 0, 2, 0, 0, 1, 0, 0, 1, 0, 0, 2, 0, 0, 2, 0, 0, 1, 0, 0, 1, 0, 0, 2, 0, 0, 2, 0, 0, 1, 0, 0, 1, 0, 0, 2, 0, 0, 2, ...
LINKS
MATHEMATICA
Table[IntegerExponent[BellB[n], 3], {n, 0, 100}] (* Amiram Eldar, Nov 23 2019 *)
PROG
(Magma) [Valuation(Bell(n), 3): n in [0..110]]; // Bruno Berselli, Aug 05 2013
CROSSREFS
Sequence in context: A202717 A291195 A025439 * A116852 A269245 A321886
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 05 2013
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)