A348749 - cp's OEIS frontend

A348749 Odd numbers k for which A064989(sigma(k)) > A064989(k), where A064989 shifts the prime factorization one step towards lower primes, and sigma is the sum of divisors function.

n	a(n)
1	9
2	25
3	45
4	49
5	75
6	81
7	117
8	121
9	225
10	243
11	289
12	325
13	333
14	405
15	441
16	529
17	549
18	605
19	625
20	657
21	675
22	729
23	841
24	925
25	1053
26	1089
27	1125
28	1215
29	1225
30	1413
31	1445
32	1521
33	1525
34	1575
35	1665
36	1681
37	1737
38	1825
39	1875
40	2025
41	2205
42	2401
43	2475
44	2493
45	2601
46	2817
47	2825
48	2925
49	2997
50	3025
51	3033
52	3125
53	3249
54	3481
55	3573
56	3645
57	3675
58	3789

[9, 25, 45, 49, 75, 81, 117, 121, 225, 243, 289, 325, 333, 405, 441, 529, 549, 605, 625, 657, 675, 729, 841, 925, 1053, 1089, 1125, 1215, 1225, 1413, 1445, 1521, 1525, 1575, 1665, 1681, 1737, 1825, 1875, 2025, 2205, 2401, 2475, 2493, 2601, 2817, 2825, 2925, 2997, 3025, 3033, 3125, 3249, 3481, 3573, 3645, 3675, 3789]

cp's OEIS Frontend

A348749 Odd numbers k for which A064989(sigma(k)) > A064989(k), where A064989 shifts the prime factorization one step towards lower primes, and sigma is the sum of divisors function.

Table of values

List of values