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.

A144519 Triangular numbers n*(n+1)/2 with n prime and n+1 nonprime.

Table of values

n a(n)
1 6
2 15
3 28
4 66
5 91
6 153
7 190
8 276
9 435
10 496
11 703
12 861
13 946
14 1128
15 1431
16 1770
17 1891
18 2278
19 2556
20 2701
21 3160
22 3486
23 4005
24 4753
25 5151
26 5356
27 5778
28 5995
29 6441
30 8128
31 8646
32 9453
33 9730
34 11175
35 11476
36 12403
37 13366
38 14028
39 15051
40 16110
41 16471
42 18336
43 18721
44 19503
45 19900
46 22366
47 24976
48 25878

List of values

[6, 15, 28, 66, 91, 153, 190, 276, 435, 496, 703, 861, 946, 1128, 1431, 1770, 1891, 2278, 2556, 2701, 3160, 3486, 4005, 4753, 5151, 5356, 5778, 5995, 6441, 8128, 8646, 9453, 9730, 11175, 11476, 12403, 13366, 14028, 15051, 16110, 16471, 18336, 18721, 19503, 19900, 22366, 24976, 25878]