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 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 20 |
| 7 | 47 |
| 8 | 108 |
| 9 | 252 |
| 10 | 582 |
| 11 | 1345 |
| 12 | 3086 |
| 13 | 7072 |
| 14 | 16121 |
| 15 | 36667 |
| 16 | 83099 |
| 17 | 187885 |
| 18 | 423610 |
| 19 | 953033 |
| 20 | 2139158 |
| 21 | 4792126 |
| 22 | 10714105 |
| 23 | 23911794 |
| 24 | 53273599 |
| 25 | 118497834 |
| 26 | 263164833 |
| 27 | 583582570 |
| 28 | 1292276355 |
| 29 | 2857691087 |
| 30 | 6311058671 |
| 31 | 13919982308 |
| 32 | 30664998056 |
| 33 | 67473574130 |