A071965 - cp's OEIS frontend

A071965 Numbers k such that k = Gpf(k) * Gpf(sigma(k)) where Gpf(k) = A006530(k) is the greatest prime factor of k.

n	a(n)
1	15
2	33
3	51
4	69
5	91
6	95
7	141
8	145
9	159
10	213
11	287
12	295
13	321
14	395
15	445
16	473
17	573
18	581
19	679
20	703
21	745
22	895
23	973
24	995
25	1139
26	1149
27	1169
28	1195
29	1199
30	1293
31	1339
32	1345
33	1441
34	1561
35	1717
36	1757
37	1795
38	1891
39	1941
40	2051
41	2147
42	2167
43	2245
44	2353
45	2395
46	2443
47	2495
48	2589

[15, 33, 51, 69, 91, 95, 141, 145, 159, 213, 287, 295, 321, 395, 445, 473, 573, 581, 679, 703, 745, 895, 973, 995, 1139, 1149, 1169, 1195, 1199, 1293, 1339, 1345, 1441, 1561, 1717, 1757, 1795, 1891, 1941, 2051, 2147, 2167, 2245, 2353, 2395, 2443, 2495, 2589]

cp's OEIS Frontend

A071965 Numbers k such that k = Gpf(k) * Gpf(sigma(k)) where Gpf(k) = A006530(k) is the greatest prime factor of k.

Table of values

List of values