A321766 - cp's OEIS frontend

A321766 Number of permutations f of {1,...,n} such that 3^k + 3^(f(k)) - 1 is prime for every k = 1,...,n.

n	a(n)
1	1
2	2
3	3
4	11
5	14
6	33
7	59
8	290
9	843
10	690
11	231
12	978
13	2896
14	2966
15	38252
16	384917
17	22351
18	68546
19	28245
20	147459
21	84578
22	17647
23	17647
24	232213
25	17647
26	792
27	93640
28	785178
29	5635699
30	11658279
31	67706584
32	351837312
33	233636388
34	26967286
35	35027435
36	242576452

[1, 2, 3, 11, 14, 33, 59, 290, 843, 690, 231, 978, 2896, 2966, 38252, 384917, 22351, 68546, 28245, 147459, 84578, 17647, 17647, 232213, 17647, 792, 93640, 785178, 5635699, 11658279, 67706584, 351837312, 233636388, 26967286, 35027435, 242576452]

cp's OEIS Frontend

A321766 Number of permutations f of {1,...,n} such that 3^k + 3^(f(k)) - 1 is prime for every k = 1,...,n.

Table of values

List of values