A250203 - cp's OEIS frontend

A250203 Numbers n such that the Phi_n(2) is the product of exactly two primes and is divisible by 2n+1.

n	a(n)
1	11
2	20
3	23
4	35
5	39
6	48
7	83
8	96
9	131
10	231
11	303
12	375
13	384
14	519
15	771
16	848
17	1400
18	1983
19	2280
20	2640
21	2715
22	3359
23	6144
24	7736
25	7911
26	11079
27	13224
28	16664
29	24263
30	36168
31	130439
32	406583

[11, 20, 23, 35, 39, 48, 83, 96, 131, 231, 303, 375, 384, 519, 771, 848, 1400, 1983, 2280, 2640, 2715, 3359, 6144, 7736, 7911, 11079, 13224, 16664, 24263, 36168, 130439, 406583]

cp's OEIS Frontend

A250203 Numbers n such that the Phi_n(2) is the product of exactly two primes and is divisible by 2n+1.

Table of values

List of values