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.
| n | a(n) |
|---|---|
| 1 | 645 |
| 2 | 25761 |
| 3 | 212421 |
| 4 | 332949 |
| 5 | 656601 |
| 6 | 6212361 |
| 7 | 63560685 |
| 8 | 413435121 |
| 9 | 1112691009 |
| 10 | 1121315385 |
| 11 | 1239702465 |
| 12 | 2851612221 |
| 13 | 5616154545 |
| 14 | 6454103601 |
| 15 | 6689540901 |
| 16 | 9691152801 |
| 17 | 9728582781 |
| 18 | 11970358401 |
| 19 | 12028438605 |
| 20 | 15076352901 |
| 21 | 17402551365 |