A175901 - cp's OEIS frontend

A175901 Numbers n such that there exists a smaller number k such that k^2-1 has exactly the same set of distinct prime divisors as n^2-1.

n	a(n)
1	7
2	17
3	19
4	26
5	31
6	41
7	49
8	53
9	55
10	65
11	71
12	76
13	97
14	109
15	127
16	129
17	161
18	191
19	197
20	199
21	209
22	239
23	241
24	251
25	271
26	289
27	295
28	351
29	391
30	401
31	433
32	449
33	485
34	511
35	575
36	577
37	626
38	647
39	649
40	685
41	701
42	703
43	721
44	727
45	799
46	811
47	881
48	883
49	901
50	967
51	989
52	1025
53	1055
54	1079

[7, 17, 19, 26, 31, 41, 49, 53, 55, 65, 71, 76, 97, 109, 127, 129, 161, 191, 197, 199, 209, 239, 241, 251, 271, 289, 295, 351, 391, 401, 433, 449, 485, 511, 575, 577, 626, 647, 649, 685, 701, 703, 721, 727, 799, 811, 881, 883, 901, 967, 989, 1025, 1055, 1079]

cp's OEIS Frontend

A175901 Numbers n such that there exists a smaller number k such that k^2-1 has exactly the same set of distinct prime divisors as n^2-1.

Table of values

List of values