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 | 0 |
| 1 | 1 |
| 2 | 34 |
| 3 | 279 |
| 4 | 1370 |
| 5 | 4775 |
| 6 | 14196 |
| 7 | 35745 |
| 8 | 83486 |
| 9 | 177120 |
| 10 | 358710 |
| 11 | 681316 |
| 12 | 1257414 |
| 13 | 2212343 |
| 14 | 3811590 |
| 15 | 6344760 |
| 16 | 10381686 |
| 17 | 16534989 |
| 18 | 25994160 |
| 19 | 39973360 |
| 20 | 60802860 |
| 21 | 90875412 |
| 22 | 134507694 |
| 23 | 196208405 |
| 24 | 283895550 |
| 25 | 405646460 |
| 26 | 575437476 |
| 27 | 807778980 |
| 28 | 1126478494 |
| 29 | 1556675935 |