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 | 0 |
| 2 | 2 |
| 3 | 504 |
| 4 | 10010 |
| 5 | 78052 |
| 6 | 368868 |
| 7 | 1280832 |
| 8 | 3612344 |
| 9 | 8774380 |
| 10 | 19049692 |
| 11 | 37898664 |
| 12 | 70311824 |
| 13 | 123209012 |
| 14 | 205885204 |
| 15 | 330502992 |
| 16 | 512631720 |
| 17 | 771833276 |
| 18 | 1132294540 |
| 19 | 1623506488 |
| 20 | 2280989952 |
| 21 | 3147068036 |
| 22 | 4271685188 |
| 23 | 5713272928 |
| 24 | 7539662232 |
| 25 | 9829042572 |
| 26 | 12670967612 |