A275928 Number of odd divisors of A101292(n).

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

Table of n, a(n) for n=0..61.

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

Cf. A001277, A101292.

Sequence in context: A171715 A264605 A353245 * A221072 A339162 A360808

Adjacent sequences: A275925 A275926 A275927 * A275929 A275930 A275931

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