A083539 - cp's OEIS frontend

A083539 a(n) = sigma(n) * sigma(n+1): product of sigma-values for consecutive integers.

n	a(n)
1	3
2	12
3	28
4	42
5	72
6	96
7	120
8	195
9	234
10	216
11	336
12	392
13	336
14	576
15	744
16	558
17	702
18	780
19	840
20	1344
21	1152
22	864
23	1440
24	1860
25	1302
26	1680
27	2240
28	1680
29	2160
30	2304
31	2016
32	3024
33	2592
34	2592
35	4368
36	3458
37	2280
38	3360
39	5040
40	3780
41	4032
42	4224
43	3696
44	6552
45	5616
46	3456
47	5952

[3, 12, 28, 42, 72, 96, 120, 195, 234, 216, 336, 392, 336, 576, 744, 558, 702, 780, 840, 1344, 1152, 864, 1440, 1860, 1302, 1680, 2240, 1680, 2160, 2304, 2016, 3024, 2592, 2592, 4368, 3458, 2280, 3360, 5040, 3780, 4032, 4224, 3696, 6552, 5616, 3456, 5952]

cp's OEIS Frontend

A083539 a(n) = sigma(n) * sigma(n+1): product of sigma-values for consecutive integers.

Table of values

List of values