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A275928
Number of odd divisors of A101292(n).
1
1, 1, 2, 2, 2, 8, 8, 4, 12, 18, 8, 8, 4, 12, 32, 8, 4, 24, 12, 16, 128, 64, 32, 16, 96, 144, 32, 64, 12, 256, 16, 16, 16, 384, 128, 48, 6, 48, 64, 128, 8, 64, 32, 64, 384, 144, 16, 128, 12, 144, 768, 64, 32, 2048, 128, 256, 256, 1536, 32, 64, 128, 48
OFFSET
0,3
LINKS
R. C. Castillo, On the Sum of Corresponding Factorials and Triangular Numbers: Runsums, Trapezoids and Politeness, Asia Pacific Journal of Multidisciplinary Research, 3 (2015), 95-101.
MATHEMATICA
Table[Count[Divisors[n! + Total@ Range@ n], d_ /; OddQ@ d], {n, 0, 54}] (* Michael De Vlieger, Aug 30 2016 *)
CROSSREFS
Sequence in context: A171715 A264605 A353245 * A221072 A339162 A360808
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 30 2016
EXTENSIONS
More terms from Michael De Vlieger, Aug 30 2016
More terms from Alois P. Heinz, Aug 30 2016
STATUS
approved