A139082 - cp's OEIS frontend

A139082 a(n) = (largest power of a prime dividing n) * (largest power of a prime dividing (n+1)).

n	a(n)
1	2
2	6
3	12
4	20
5	15
6	21
7	56
8	72
9	45
10	55
11	44
12	52
13	91
14	35
15	80
16	272
17	153
18	171
19	95
20	35
21	77
22	253
23	184
24	200
25	325
26	351
27	189
28	203
29	145
30	155
31	992
32	352
33	187
34	119
35	63
36	333
37	703
38	247
39	104
40	328
41	287
42	301
43	473
44	99
45	207
46	1081
47	752
48	784
49	1225
50	425
51	221
52	689
53	1431
54	297
55	88
56	152
57	551

[2, 6, 12, 20, 15, 21, 56, 72, 45, 55, 44, 52, 91, 35, 80, 272, 153, 171, 95, 35, 77, 253, 184, 200, 325, 351, 189, 203, 145, 155, 992, 352, 187, 119, 63, 333, 703, 247, 104, 328, 287, 301, 473, 99, 207, 1081, 752, 784, 1225, 425, 221, 689, 1431, 297, 88, 152, 551]

cp's OEIS Frontend

A139082 a(n) = (largest power of a prime dividing n) * (largest power of a prime dividing (n+1)).

Table of values

List of values