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 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 6 |
| 8 | 9 |
| 9 | 19 |
| 10 | 33 |
| 11 | 67 |
| 12 | 130 |
| 13 | 270 |
| 14 | 547 |
| 15 | 1165 |
| 16 | 2456 |
| 17 | 5314 |
| 18 | 11521 |
| 19 | 25357 |
| 20 | 56022 |
| 21 | 125067 |
| 22 | 280471 |
| 23 | 633490 |
| 24 | 1437340 |
| 25 | 3278912 |
| 26 | 7510503 |
| 27 | 17277697 |
| 28 | 39890262 |
| 29 | 92427559 |
| 30 | 214835923 |
| 31 | 500879602 |
| 32 | 1171013350 |
| 33 | 2744946654 |
| 34 | 6450077870 |