A303712 - cp's OEIS frontend

A303712 a(n) is the smallest number such that there are exactly n numbers k (including a(n) itself) such that U(k) is isomorphic to U(a(n)) (or 0 if no such number exists). Here U(k) is the multiplicative group of integers modulo k.

n	a(n)
1	24
2	1
3	3
4	7
5	55
6	129
7	35
8	104
9	407
10	707
11	143
12	371
13	899
14	665
15	1144
16	1771
17	385
18	3003
19	3451
20	5005
21	7049
22	8041
23	7579
24	12243
25	4081
26	5291
27	3857
28	9361
29	2717
30	2233

[24, 1, 3, 7, 55, 129, 35, 104, 407, 707, 143, 371, 899, 665, 1144, 1771, 385, 3003, 3451, 5005, 7049, 8041, 7579, 12243, 4081, 5291, 3857, 9361, 2717, 2233]

cp's OEIS Frontend

A303712 a(n) is the smallest number such that there are exactly n numbers k (including a(n) itself) such that U(k) is isomorphic to U(a(n)) (or 0 if no such number exists). Here U(k) is the multiplicative group of integers modulo k.

Table of values

List of values