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.

A261581 Primes such that z(p) is not divisible by 4 where z(n) is A214028(n), the smallest k such that n divides A000129(k), the k-th Pell number.

Table of values

n a(n)
1 2
2 5
3 7
4 13
5 23
6 29
7 31
8 37
9 41
10 47
11 53
12 61
13 71
14 79
15 101
16 103
17 109
18 127
19 137
20 149
21 151
22 157
23 167
24 173
25 181
26 191
27 197
28 199
29 223
30 229
31 239
32 263
33 269
34 271
35 277
36 293
37 311
38 313
39 317
40 349
41 353
42 359
43 367
44 373
45 383
46 389
47 397
48 409
49 421
50 431
51 439
52 457
53 461
54 463
55 479
56 487

List of values

[2, 5, 7, 13, 23, 29, 31, 37, 41, 47, 53, 61, 71, 79, 101, 103, 109, 127, 137, 149, 151, 157, 167, 173, 181, 191, 197, 199, 223, 229, 239, 263, 269, 271, 277, 293, 311, 313, 317, 349, 353, 359, 367, 373, 383, 389, 397, 409, 421, 431, 439, 457, 461, 463, 479, 487]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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