A059690 - cp's OEIS frontend

A059690 Number of distinct Cunningham chains of first kind whose initial prime (cf. A059453) <= 2^n.

n	a(n)
1	1
2	2
3	2
4	2
5	3
6	5
7	7
8	13
9	20
10	31
11	52
12	83
13	142
14	242
15	412
16	742
17	1308
18	2294
19	4040
20	7327
21	13253
22	24255
23	44306
24	81700
25	150401
26	277335
27	513705
28	954847
29	1780466
30	3325109
31	6224282
32	11676337
33	21947583
34	41327438

[1, 2, 2, 2, 3, 5, 7, 13, 20, 31, 52, 83, 142, 242, 412, 742, 1308, 2294, 4040, 7327, 13253, 24255, 44306, 81700, 150401, 277335, 513705, 954847, 1780466, 3325109, 6224282, 11676337, 21947583, 41327438]

cp's OEIS Frontend

A059690 Number of distinct Cunningham chains of first kind whose initial prime (cf. A059453) <= 2^n.

Table of values

List of values