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 | 2 |
| 3 | 7 |
| 4 | 15 |
| 5 | 39 |
| 6 | 94 |
| 7 | 224 |
| 8 | 526 |
| 9 | 1236 |
| 10 | 2857 |
| 11 | 6568 |
| 12 | 15003 |
| 13 | 34030 |
| 14 | 76757 |
| 15 | 172216 |
| 16 | 384386 |
| 17 | 853960 |
| 18 | 1888891 |
| 19 | 4160524 |
| 20 | 9128355 |
| 21 | 19953661 |
| 22 | 43463021 |
| 23 | 94354292 |
| 24 | 204182435 |
| 25 | 440505489 |
| 26 | 947590424 |
| 27 | 2032730905 |
| 28 | 4348897216 |
| 29 | 9280361316 |
| 30 | 19755155955 |
| 31 | 41953293592 |
| 32 | 88891338202 |