A236854 - cp's OEIS frontend

A236854 Self-inverse permutation of natural numbers: a(1)=1, then a(p_n)=c_{a(n)}, a(c_n)=p_{a(n)}, where p_n = n-th prime, c_n = n-th composite.

n	a(n)
1	1
2	4
3	9
4	2
5	16
6	7
7	6
8	23
9	3
10	53
11	26
12	17
13	14
14	13
15	83
16	5
17	12
18	241
19	35
20	101
21	59
22	43
23	8
24	41
25	431
26	11
27	37
28	1523
29	75
30	149
31	39
32	547
33	277
34	191
35	19
36	179
37	27
38	3001
39	31
40	157
41	24
42	12763
43	22
44	379
45	859
46	167
47	114
48	3943
49	1787
50	1153
51	67
52	1063
53	10
54	103
55	27457
56	127
57	919
58	89
59	21

[1, 4, 9, 2, 16, 7, 6, 23, 3, 53, 26, 17, 14, 13, 83, 5, 12, 241, 35, 101, 59, 43, 8, 41, 431, 11, 37, 1523, 75, 149, 39, 547, 277, 191, 19, 179, 27, 3001, 31, 157, 24, 12763, 22, 379, 859, 167, 114, 3943, 1787, 1153, 67, 1063, 10, 103, 27457, 127, 919, 89, 21]

cp's OEIS Frontend

A236854 Self-inverse permutation of natural numbers: a(1)=1, then a(p_n)=c_{a(n)}, a(c_n)=p_{a(n)}, where p_n = n-th prime, c_n = n-th composite.

Table of values

List of values