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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 2 |
| 7 | 4 |
| 8 | 5 |
| 9 | 11 |
| 10 | 19 |
| 11 | 40 |
| 12 | 81 |
| 13 | 173 |
| 14 | 365 |
| 15 | 782 |
| 16 | 1669 |
| 17 | 3585 |
| 18 | 7690 |
| 19 | 16565 |
| 20 | 35699 |
| 21 | 77200 |
| 22 | 167197 |
| 23 | 363201 |
| 24 | 790508 |
| 25 | 1725057 |
| 26 | 3772067 |
| 27 | 8266834 |
| 28 | 18152392 |
| 29 | 39937523 |
| 30 | 88021367 |
| 31 | 194329103 |
| 32 | 429701988 |
| 33 | 951587473 |