A062370 - cp's OEIS frontend

A062370 a(n) = Sum_{i|n,j|n} sigma(i)*sigma(j)/sigma(gcd(i,j)), where sigma(n) = sum of divisors of n.

n	a(n)
1	1
2	10
3	13
4	45
5	19
6	130
7	25
8	150
9	78
10	190
11	37
12	585
13	43
14	250
15	247
16	429
17	55
18	780
19	61
20	855
21	325
22	370
23	73
24	1950
25	174
26	430
27	358
28	1125
29	91
30	2470
31	97
32	1122
33	481
34	550
35	475
36	3510
37	115
38	610
39	559
40	2850
41	127
42	3250
43	133
44	1665
45	1482
46	730
47	145
48	5577
49	310
50	1740
51	715
52	1935

[1, 10, 13, 45, 19, 130, 25, 150, 78, 190, 37, 585, 43, 250, 247, 429, 55, 780, 61, 855, 325, 370, 73, 1950, 174, 430, 358, 1125, 91, 2470, 97, 1122, 481, 550, 475, 3510, 115, 610, 559, 2850, 127, 3250, 133, 1665, 1482, 730, 145, 5577, 310, 1740, 715, 1935]

cp's OEIS Frontend

A062370 a(n) = Sum_{i|n,j|n} sigma(i)*sigma(j)/sigma(gcd(i,j)), where sigma(n) = sum of divisors of n.

Table of values

List of values