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 | 22 |
| 4 | 1966 |
| 5 | 3262 |
| 6 | 5014 |
| 7 | 60454 |
| 8 | 1016506 |
| 9 | 4420162 |
| 10 | 12055510 |
| 11 | 14365606 |
| 12 | 25726726 |
| 13 | 27896422 |
| 14 | 66562306 |
| 15 | 72764734 |
| 16 | 98734966 |
| 17 | 175186654 |
| 18 | 224868310 |
| 19 | 253694926 |
| 20 | 288657202 |
| 21 | 386668342 |
| 22 | 421575406 |
| 23 | 504737746 |
| 24 | 630645454 |
| 25 | 1493547998 |
| 26 | 1653797794 |
| 27 | 2120325010 |
| 28 | 2221315150 |