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.

A234847 Primes which are sum of the first k composite numbers and such that the sum of the first k+1 composites is also prime.

Table of values

n a(n)
1 997
2 1049
3 1709
4 2137
5 2953
6 3889
7 3989
8 28643
9 43451
10 121937
11 189239
12 225077
13 662843
14 785303
15 860143
16 874351
17 959209
18 1026229
19 1051151
20 1271687
21 1285507
22 1772297
23 2525801
24 2834413
25 2865199
26 3456053
27 3484361
28 3538477
29 4402241
30 4762267
31 8240539
32 11557543
33 15774301

List of values

[997, 1049, 1709, 2137, 2953, 3889, 3989, 28643, 43451, 121937, 189239, 225077, 662843, 785303, 860143, 874351, 959209, 1026229, 1051151, 1271687, 1285507, 1772297, 2525801, 2834413, 2865199, 3456053, 3484361, 3538477, 4402241, 4762267, 8240539, 11557543, 15774301]

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

Content is available under The OEIS End-User License Agreement.