A222713 - cp's OEIS frontend

A222713 Least number k such that n divides gcd(sigma(k), phi(k)) (A009223).

n	a(n)
1	1
2	3
3	14
4	12
5	88
6	14
7	116
8	15
9	190
10	88
11	989
12	35
13	477
14	116
15	209
16	105
17	6901
18	190
19	7067
20	88
21	196
22	989
23	6439
24	35
25	15049
26	477
27	2754
28	172
29	10207
30	209
31	4976
32	336
33	989
34	6901
35	1189
36	190
37	10877
38	7067
39	477
40	248
41	13529
42	377
43	44461
44	989
45	418
46	6439
47	79523
48	105
49	10244
50	15049

[1, 3, 14, 12, 88, 14, 116, 15, 190, 88, 989, 35, 477, 116, 209, 105, 6901, 190, 7067, 88, 196, 989, 6439, 35, 15049, 477, 2754, 172, 10207, 209, 4976, 336, 989, 6901, 1189, 190, 10877, 7067, 477, 248, 13529, 377, 44461, 989, 418, 6439, 79523, 105, 10244, 15049]

cp's OEIS Frontend

A222713 Least number k such that n divides gcd(sigma(k), phi(k)) (A009223).

Table of values

List of values