A253773 - cp's OEIS frontend

A253773 Numbers k such that 4^k + 15 is prime.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	8
8	11
9	13
10	15
11	16
12	20
13	21
14	23
15	36
16	38
17	90
18	99
19	155
20	164
21	171
22	254
23	255
24	273
25	404
26	1386
27	1941
28	1970
29	2420
30	3759
31	5559
32	5776
33	6369
34	6429
35	22061
36	32330
37	81780
38	90248
39	162933
40	240920
41	504584

[1, 2, 3, 4, 5, 6, 8, 11, 13, 15, 16, 20, 21, 23, 36, 38, 90, 99, 155, 164, 171, 254, 255, 273, 404, 1386, 1941, 1970, 2420, 3759, 5559, 5776, 6369, 6429, 22061, 32330, 81780, 90248, 162933, 240920, 504584]

cp's OEIS Frontend

A253773 Numbers k such that 4^k + 15 is prime.

Table of values

List of values