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 | 3 |
| 3 | 5 |
| 4 | 23 |
| 5 | 88 |
| 6 | 471 |
| 7 | 2517 |
| 8 | 14611 |
| 9 | 86014 |
| 10 | 519574 |
| 11 | 3177405 |
| 12 | 19681214 |
| 13 | 123050881 |
| 14 | 775868013 |
| 15 | 4926859869 |
| 16 | 31483531830 |
| 17 | 202298489710 |
| 18 | 1306289630067 |
| 19 | 8472236548514 |
| 20 | 55167003603285 |
| 21 | 360512087413974 |
| 22 | 2363623888860990 |
| 23 | 15542899182846478 |
| 24 | 102488033365084376 |