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.

A130178 Triangular numbers which are the average of two consecutive primes.

Table of values

n a(n)
1 6
2 15
3 21
4 45
5 105
6 120
7 231
8 300
9 351
10 465
11 741
12 780
13 861
14 1176
15 1431
16 1485
17 3081
18 3240
19 3321
20 3828
21 4005
22 4278
23 5460
24 6786
25 6903
26 7140
27 7381
28 7503
29 7875
30 8001
31 10731
32 11175
33 11325
34 11781
35 12246
36 12561
37 13530
38 13695
39 14535
40 14706
41 17205
42 17391

List of values

[6, 15, 21, 45, 105, 120, 231, 300, 351, 465, 741, 780, 861, 1176, 1431, 1485, 3081, 3240, 3321, 3828, 4005, 4278, 5460, 6786, 6903, 7140, 7381, 7503, 7875, 8001, 10731, 11175, 11325, 11781, 12246, 12561, 13530, 13695, 14535, 14706, 17205, 17391]

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

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