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 | 1 |
| 1 | 17 |
| 2 | 145 |
| 3 | 833 |
| 4 | 3649 |
| 5 | 13073 |
| 6 | 40081 |
| 7 | 108545 |
| 8 | 265729 |
| 9 | 598417 |
| 10 | 1256465 |
| 11 | 2485825 |
| 12 | 4673345 |
| 13 | 8405905 |
| 14 | 14546705 |
| 15 | 24331777 |
| 16 | 39490049 |
| 17 | 62390545 |
| 18 | 96220561 |
| 19 | 145198913 |
| 20 | 214828609 |
| 21 | 312193553 |
| 22 | 446304145 |
| 23 | 628496897 |
| 24 | 872893441 |
| 25 | 1196924561 |
| 26 | 1621925137 |
| 27 | 2173806145 |
| 28 | 2883810113 |
| 29 | 3789356689 |
| 30 | 4934985233 |