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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.

A064440 Numbers k such that A048138(k) is a prime and sets a new record for such primes.

Table of values

n a(n)
1 6
2 21
3 31
4 79
5 121
6 265
7 271
8 379
9 541
10 631
11 1051
12 1351
13 1597
14 1711
15 2071
16 2401
17 2551
18 2761
19 2881
20 2941
21 3811
22 4111
23 4471
24 4531
25 4621
26 5251
27 6091
28 8341
29 8371
30 8401
31 8821
32 9871
33 11551
34 13651
35 16171
36 19531
37 21211
38 22681
39 23101
40 27931
41 30661
42 32551
43 33811
44 37591

List of values

[6, 21, 31, 79, 121, 265, 271, 379, 541, 631, 1051, 1351, 1597, 1711, 2071, 2401, 2551, 2761, 2881, 2941, 3811, 4111, 4471, 4531, 4621, 5251, 6091, 8341, 8371, 8401, 8821, 9871, 11551, 13651, 16171, 19531, 21211, 22681, 23101, 27931, 30661, 32551, 33811, 37591]

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

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