A349176 - cp's OEIS frontend

A349176 Odd numbers k for which gcd(k, A003961(k)) = gcd(sigma(k), A003961(k)) > 1, where A003961(n) is fully multiplicative with a(prime(k)) = prime(k+1), and sigma is the sum of divisors function.

n	a(n)
1	135
2	285
3	435
4	455
5	855
6	885
7	1185
8	1287
9	1305
10	1335
11	1425
12	1435
13	1485
14	1635
15	2235
16	2275
17	2295
18	2655
19	2685
20	2905
21	2985
22	3105
23	3135
24	3185
25	3311
26	3395
27	3435
28	3555
29	3585
30	4005
31	4035
32	4185
33	4425
34	4785
35	4865
36	4905
37	4995
38	5385
39	5685
40	5805
41	5835
42	5845
43	5925
44	6135
45	6237
46	6335
47	6345
48	6585
49	6675
50	6735
51	7125
52	7155
53	7175
54	7185

[135, 285, 435, 455, 855, 885, 1185, 1287, 1305, 1335, 1425, 1435, 1485, 1635, 2235, 2275, 2295, 2655, 2685, 2905, 2985, 3105, 3135, 3185, 3311, 3395, 3435, 3555, 3585, 4005, 4035, 4185, 4425, 4785, 4865, 4905, 4995, 5385, 5685, 5805, 5835, 5845, 5925, 6135, 6237, 6335, 6345, 6585, 6675, 6735, 7125, 7155, 7175, 7185]

cp's OEIS Frontend

A349176 Odd numbers k for which gcd(k, A003961(k)) = gcd(sigma(k), A003961(k)) > 1, where A003961(n) is fully multiplicative with a(prime(k)) = prime(k+1), and sigma is the sum of divisors function.

Table of values

List of values