A319313 - cp's OEIS frontend

A319313 a(n) is the least integer m such that A047994(m) = ((n-2)/n)*m where A047994 is the unitary totient function, or 0 if there is no such m.

n	a(n)
3	6
4	2
5	20
6	3
7	1008
8	4
9	72
10	5
11	4400
12	144
13	835660800
14	7
15	10800
16	8
17	272
18	9
19	9849600
20	400
21	208039104
22	11
23	145520912351232000000
24	64281600
25	3608344625286776094720000
26	13
27	1296
28	84672
29	90944
30	129600

[6, 2, 20, 3, 1008, 4, 72, 5, 4400, 144, 835660800, 7, 10800, 8, 272, 9, 9849600, 400, 208039104, 11, 145520912351232000000, 64281600, 3608344625286776094720000, 13, 1296, 84672, 90944, 129600]

cp's OEIS Frontend

A319313 a(n) is the least integer m such that A047994(m) = ((n-2)/n)*m where A047994 is the unitary totient function, or 0 if there is no such m.

Table of values

List of values