cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A348935 Numbers k congruent to 1 or 5 mod 6, for which A064989(A064989(sigma(k^2))) < A064989(A064989(k^2)), where A064989 shifts the prime factorization one step towards lower primes, and sigma is the sum of divisors function.

Table of values

n a(n)
1 19
2 23
3 31
4 37
5 43
6 47
7 53
8 61
9 67
10 73
11 79
12 83
13 97
14 103
15 107
16 109
17 113
18 127
19 133
20 137
21 139
22 149
23 151
24 157
25 163
26 179
27 181
28 191
29 193
30 197
31 199
32 211
33 217
34 223
35 229
36 233
37 239
38 241
39 247
40 251
41 257
42 259
43 263
44 269
45 271
46 277
47 281
48 283
49 299
50 301
51 307
52 311
53 313
54 317
55 331
56 335
57 337
58 341
59 347
60 349
61 353
62 359
63 367
64 371
65 373
66 379

List of values

[19, 23, 31, 37, 43, 47, 53, 61, 67, 73, 79, 83, 97, 103, 107, 109, 113, 127, 133, 137, 139, 149, 151, 157, 163, 179, 181, 191, 193, 197, 199, 211, 217, 223, 229, 233, 239, 241, 247, 251, 257, 259, 263, 269, 271, 277, 281, 283, 299, 301, 307, 311, 313, 317, 331, 335, 337, 341, 347, 349, 353, 359, 367, 371, 373, 379]