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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 34 |
| 6 | 95 |
| 7 | 190 |
| 8 | 325 |
| 9 | 506 |
| 10 | 3324 |
| 11 | 10353 |
| 12 | 25607 |
| 13 | 55346 |
| 14 | 108756 |
| 15 | 389216 |
| 16 | 1208901 |
| 17 | 3281686 |
| 18 | 8006108 |
| 19 | 17950204 |
| 20 | 51430928 |
| 21 | 150609259 |
| 22 | 419540401 |
| 23 | 1090827453 |
| 24 | 2651884943 |
| 25 | 7077981621 |
| 26 | 19691707908 |
| 27 | 54499735145 |
| 28 | 145671654672 |
| 29 | 371632691473 |
| 30 | 976543067070 |