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 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 16 |
| 6 | 45 |
| 7 | 115 |
| 8 | 296 |
| 9 | 733 |
| 10 | 1801 |
| 11 | 4338 |
| 12 | 10380 |
| 13 | 24531 |
| 14 | 57622 |
| 15 | 134317 |
| 16 | 311465 |
| 17 | 718297 |
| 18 | 1649579 |
| 19 | 3772448 |
| 20 | 8597284 |
| 21 | 19527774 |
| 22 | 44225665 |
| 23 | 99885035 |
| 24 | 225032910 |
| 25 | 505797776 |
| 26 | 1134419571 |
| 27 | 2539173978 |
| 28 | 5672736196 |
| 29 | 12650878942 |
| 30 | 28165845957 |
| 31 | 62609097765 |
| 32 | 138963709623 |