A163191 - cp's OEIS frontend

A163191 a(n) = Sum_{k=0..n} (-1)^(n-k)C(n,k)sigma(n,k) for n>0 with a(0)=1.

n	a(n)
0	1
1	0
2	1
3	8
4	82
5	1024
6	15690
7	279936
8	5771363
9	134218240
10	3487832978
11	100000000000
12	3138673052884
13	106993205379072
14	3937454749863386
15	155568096631586816
16	6568441588686506948
17	295147905179352825856
18	14063102470280932000763
19	708235345355337676357632

[1, 0, 1, 8, 82, 1024, 15690, 279936, 5771363, 134218240, 3487832978, 100000000000, 3138673052884, 106993205379072, 3937454749863386, 155568096631586816, 6568441588686506948, 295147905179352825856, 14063102470280932000763, 708235345355337676357632]

cp's OEIS Frontend

A163191 a(n) = Sum_{k=0..n} (-1)^(n-k)C(n,k)sigma(n,k) for n>0 with a(0)=1.

Table of values

List of values

cp's OEIS Frontend

A163191 a(n) = Sum_{k=0..n} (-1)^(n-k)*C(n,k)*sigma(n,k) for n>0 with a(0)=1.

Table of values

List of values

A163191 a(n) = Sum_{k=0..n} (-1)^(n-k)C(n,k)sigma(n,k) for n>0 with a(0)=1.