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) |
|---|---|
| 0 | 17 |
| 1 | 18 |
| 2 | 53 |
| 3 | 230 |
| 4 | 2583 |
| 5 | 2813 |
| 6 | 5396 |
| 7 | 19001 |
| 8 | 43398 |
| 9 | 105797 |
| 10 | 360789 |
| 11 | 466586 |
| 12 | 827375 |
| 13 | 9567711 |
| 14 | 39098219 |
| 15 | 87764149 |
| 16 | 126862368 |
| 17 | 4401084661 |
| 18 | 4527947029 |
| 19 | 13456978719 |
| 20 | 58355861905 |
| 21 | 655371459674 |
| 22 | 713727321579 |