A163190 - cp's OEIS frontend

A163190 a(n) = Sum_{k=0..n} C(n,k)*sigma(n,k) for n>0 with a(0)=1.

n	a(n)
0	1
1	2
2	13
3	72
4	722
5	7808
6	122538
7	2097280
8	43444163
9	1000262656
10	25997950850
11	743008372736
12	23312187863060
13	793714773262336
14	29197324076701082
15	1152921975865606144
16	48663045048486723204
17	2185911559738696663040

[1, 2, 13, 72, 722, 7808, 122538, 2097280, 43444163, 1000262656, 25997950850, 743008372736, 23312187863060, 793714773262336, 29197324076701082, 1152921975865606144, 48663045048486723204, 2185911559738696663040]

cp's OEIS Frontend

A163190 a(n) = Sum_{k=0..n} C(n,k)*sigma(n,k) for n>0 with a(0)=1.

Table of values

List of values