A174939 - cp's OEIS frontend

A174939 a(n) = Sum_{k<=n} A007955(k) * A007955(k) = Sum_{k<=n} A007955(k)^2, where A007955(m) = product of divisors of m.

n	a(n)
1	1
2	5
3	14
4	78
5	103
6	1399
7	1448
8	5544
9	6273
10	16273
11	16394
12	3002378
13	3002547
14	3040963
15	3091588
16	4140164
17	4140453
18	38152677
19	38153038
20	102153038
21	102347519
22	102581775
23	102582304
24	110177896480
25	110177912105
26	110178369081
27	110178900522
28	110660790826
29	110660791667

[1, 5, 14, 78, 103, 1399, 1448, 5544, 6273, 16273, 16394, 3002378, 3002547, 3040963, 3091588, 4140164, 4140453, 38152677, 38153038, 102153038, 102347519, 102581775, 102582304, 110177896480, 110177912105, 110178369081, 110178900522, 110660790826, 110660791667]

cp's OEIS Frontend

A174939 a(n) = Sum_{k<=n} A007955(k) * A007955(k) = Sum_{k<=n} A007955(k)^2, where A007955(m) = product of divisors of m.

Table of values

List of values