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 | 20 |
| 2 | 167 |
| 3 | 867 |
| 4 | 3322 |
| 5 | 10309 |
| 6 | 27410 |
| 7 | 64770 |
| 8 | 139479 |
| 9 | 278674 |
| 10 | 523457 |
| 11 | 933725 |
| 12 | 1594008 |
| 13 | 2620411 |
| 14 | 4168756 |
| 15 | 6444020 |
| 16 | 9711165 |
| 17 | 14307456 |
| 18 | 20656363 |
| 19 | 29283143 |
| 20 | 40832198 |
| 21 | 56086305 |
| 22 | 75987814 |
| 23 | 101661910 |
| 24 | 134442035 |
| 25 | 175897566 |
| 26 | 227863845 |
| 27 | 292474657 |
| 28 | 372197252 |
| 29 | 469870007 |
| 30 | 588742824 |