A374979 - cp's OEIS frontend

A374979 a(n) = Sum_{i+j+k+l+m+r=n, i,j,k,l,m,r >= 1} sigma(i)sigma(j)sigma(k)sigma(l)sigma(m)*sigma(r).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	18
8	159
9	942
10	4281
11	16050
12	51932
13	149532
14	391524
15	947246
16	2143677
17	4581204
18	9316195
19	18138636
20	33984912
21	61534652
22	108055425
23	184582014
24	307515038
25	500798058
26	798762453
27	1249917936
28	1921788036
29	2907159804
30	4332046200
31	6365441400
32	9232216725

[0, 0, 0, 0, 0, 1, 18, 159, 942, 4281, 16050, 51932, 149532, 391524, 947246, 2143677, 4581204, 9316195, 18138636, 33984912, 61534652, 108055425, 184582014, 307515038, 500798058, 798762453, 1249917936, 1921788036, 2907159804, 4332046200, 6365441400, 9232216725]

cp's OEIS Frontend

A374979 a(n) = Sum_{i+j+k+l+m+r=n, i,j,k,l,m,r >= 1} sigma(i)sigma(j)sigma(k)sigma(l)sigma(m)*sigma(r).

Table of values

List of values

cp's OEIS Frontend

A374979 a(n) = Sum_{i+j+k+l+m+r=n, i,j,k,l,m,r >= 1} sigma(i)*sigma(j)*sigma(k)*sigma(l)*sigma(m)*sigma(r).

Table of values

List of values

A374979 a(n) = Sum_{i+j+k+l+m+r=n, i,j,k,l,m,r >= 1} sigma(i)sigma(j)sigma(k)sigma(l)sigma(m)*sigma(r).