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 | 1 |
| 2 | 2 |
| 3 | 15 |
| 4 | 316 |
| 5 | 16885 |
| 6 | 2174586 |
| 7 | 654313415 |
| 8 | 450179768312 |
| 9 | 696979588034313 |
| 10 | 2398044825254021110 |
| 11 | 18151895792052235541515 |
| 12 | 299782788128536523836784628 |
| 13 | 10727139906233315197412684689421 |