A271396 - cp's OEIS frontend

A271396 Integers k such that 3*k!!! - 1 is prime where k!!! is A007661(k).

n	a(n)
1	0
2	1
3	2
4	4
5	5
6	6
7	7
8	8
9	10
10	17
11	25
12	28
13	31
14	37
15	38
16	39
17	46
18	47
19	49
20	55
21	67
22	82
23	85
24	94
25	98
26	115
27	120
28	129
29	167
30	214
31	216
32	267
33	293
34	580
35	732
36	857
37	993
38	1012
39	1069
40	1308
41	1430
42	2366
43	2974
44	4017
45	4870
46	9034
47	9061
48	9752
49	10657
50	13847
51	25390

[0, 1, 2, 4, 5, 6, 7, 8, 10, 17, 25, 28, 31, 37, 38, 39, 46, 47, 49, 55, 67, 82, 85, 94, 98, 115, 120, 129, 167, 214, 216, 267, 293, 580, 732, 857, 993, 1012, 1069, 1308, 1430, 2366, 2974, 4017, 4870, 9034, 9061, 9752, 10657, 13847, 25390]

cp's OEIS Frontend

A271396 Integers k such that 3*k!!! - 1 is prime where k!!! is A007661(k).

Table of values

List of values