A263325 - cp's OEIS frontend

A263325 a(n) = sigma(n)*pi(n^2), where sigma(n) is the sum of all (positive) divisors of n, and pi(x) is the number of primes not exceeding x.

n	a(n)
1	0
2	6
3	16
4	42
5	54
6	132
7	120
8	270
9	286
10	450
11	360
12	952
13	546
14	1056
15	1152
16	1674
17	1098
18	2574
19	1440
20	3276
21	2720
22	3312
23	2376
24	6300
25	3534
26	5124
27	5160
28	7672
29	4380
30	11088
31	5184
32	10836
33	8688
34	10314
35	9600
36	19110
37	8322
38	13680
39	13440
40	22590
41	11046
42	26304
43	12452
44	24780
45	23868
46	22968
47	15792
48	42408
49	20349
50	34131

[0, 6, 16, 42, 54, 132, 120, 270, 286, 450, 360, 952, 546, 1056, 1152, 1674, 1098, 2574, 1440, 3276, 2720, 3312, 2376, 6300, 3534, 5124, 5160, 7672, 4380, 11088, 5184, 10836, 8688, 10314, 9600, 19110, 8322, 13680, 13440, 22590, 11046, 26304, 12452, 24780, 23868, 22968, 15792, 42408, 20349, 34131]

cp's OEIS Frontend

A263325 a(n) = sigma(n)*pi(n^2), where sigma(n) is the sum of all (positive) divisors of n, and pi(x) is the number of primes not exceeding x.

Table of values

List of values