A325029 - cp's OEIS frontend

A325029 a(n) = Sum_{d|n} (sigma(d)*pod(d)) where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).

n	a(n)
1	1
2	7
3	13
4	63
5	31
6	451
7	57
8	1023
9	364
10	1837
11	133
12	48891
13	183
14	4767
15	5443
16	32767
17	307
18	228250
19	381
20	337893
21	14181
22	17563
23	553
24	19956411
25	3906
26	28581
27	29524
28	1234135
29	871
30	58327681
31	993
32	2097151
33	52417
34	62737
35	58887
36	917347026
37	1407
38	87027
39	85371
40	230738853
41	1723

[1, 7, 13, 63, 31, 451, 57, 1023, 364, 1837, 133, 48891, 183, 4767, 5443, 32767, 307, 228250, 381, 337893, 14181, 17563, 553, 19956411, 3906, 28581, 29524, 1234135, 871, 58327681, 993, 2097151, 52417, 62737, 58887, 917347026, 1407, 87027, 85371, 230738853, 1723]

cp's OEIS Frontend

A325029 a(n) = Sum_{d|n} (sigma(d)*pod(d)) where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).

Table of values

List of values