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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.

A129755 Triangular numbers t such that t+10 is a prime.

Table of values

n a(n)
1 1
2 3
3 21
4 91
5 153
6 171
7 231
8 253
9 561
10 741
11 1081
12 1653
13 1711
14 1891
15 2211
16 2701
17 3321
18 3403
19 4851
20 6441
21 8001
22 9453
23 9591
24 10153
25 12403
26 15051
27 16471
28 17391
29 18721
30 23653
31 24753
32 27261
33 30381
34 32131
35 35511
36 38781
37 39621
38 41041
39 44253
40 45753
41 51681
42 55611
43 56953

List of values

[1, 3, 21, 91, 153, 171, 231, 253, 561, 741, 1081, 1653, 1711, 1891, 2211, 2701, 3321, 3403, 4851, 6441, 8001, 9453, 9591, 10153, 12403, 15051, 16471, 17391, 18721, 23653, 24753, 27261, 30381, 32131, 35511, 38781, 39621, 41041, 44253, 45753, 51681, 55611, 56953]

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

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