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 | 3 |
| 3 | 4 |
| 4 | 10 |
| 5 | 18 |
| 6 | 42 |
| 7 | 84 |
| 8 | 192 |
| 9 | 409 |
| 10 | 926 |
| 11 | 2030 |
| 12 | 4577 |
| 13 | 10171 |
| 14 | 22889 |
| 15 | 51176 |
| 16 | 115070 |
| 17 | 257987 |
| 18 | 579868 |
| 19 | 1301664 |
| 20 | 2925209 |
| 21 | 6569992 |
| 22 | 14763529 |
| 23 | 33166848 |
| 24 | 74527233 |
| 25 | 167446566 |
| 26 | 376253517 |
| 27 | 845401158 |
| 28 | 1899609267 |
| 29 | 4268309531 |
| 30 | 9590827171 |
| 31 | 21550227328 |
| 32 | 48422972296 |
| 33 | 108805058758 |