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 | 19 |
| 2 | 190 |
| 3 | 1349 |
| 4 | 7676 |
| 5 | 37278 |
| 6 | 160417 |
| 7 | 626924 |
| 8 | 2263698 |
| 9 | 7647652 |
| 10 | 24405633 |
| 11 | 74120672 |
| 12 | 215505334 |
| 13 | 602763220 |
| 14 | 1628328880 |
| 15 | 4262845643 |
| 16 | 10845598563 |
| 17 | 26882001287 |
| 18 | 65048680364 |
| 19 | 153950675585 |
| 20 | 356936640088 |
| 21 | 811869015895 |
| 22 | 1813912504439 |
| 23 | 3985419541978 |
| 24 | 8619872682020 |
| 25 | 18369414409148 |