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 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 6 |
| 7 | 9 |
| 8 | 23 |
| 9 | 38 |
| 10 | 90 |
| 11 | 147 |
| 12 | 341 |
| 13 | 564 |
| 14 | 1294 |
| 15 | 2148 |
| 16 | 4896 |
| 17 | 8195 |
| 18 | 18612 |
| 19 | 31349 |
| 20 | 70983 |
| 21 | 120357 |
| 22 | 271921 |
| 23 | 463712 |
| 24 | 1045559 |
| 25 | 1792582 |
| 26 | 4034832 |
| 27 | 6950579 |
| 28 | 15619507 |
| 29 | 27023509 |
| 30 | 60638559 |
| 31 | 105320716 |
| 32 | 236006955 |
| 33 | 411364068 |
| 34 | 920626423 |
| 35 | 1609836928 |