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 | 313 |
| 3 | 4077 |
| 4 | 42217 |
| 5 | 75848 |
| 6 | 1276101 |
| 7 | 2468936 |
| 8 | 8105257 |
| 9 | 13213921 |
| 10 | 23740424 |
| 11 | 76136648 |
| 12 | 172118709 |
| 13 | 249948601 |
| 14 | 296474857 |
| 15 | 309232296 |
| 16 | 772776968 |
| 17 | 1236329761 |
| 18 | 1254551521 |
| 19 | 2288805793 |
| 20 | 2372141576 |
| 21 | 2410951561 |
| 22 | 2536945441 |
| 23 | 3202075016 |
| 24 | 10065852072 |