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 | 6 |
| 7 | 16 |
| 8 | 36 |
| 9 | 75 |
| 10 | 163 |
| 11 | 391 |
| 12 | 991 |
| 13 | 2498 |
| 14 | 6150 |
| 15 | 15016 |
| 16 | 37116 |
| 17 | 93481 |
| 18 | 238137 |
| 19 | 607921 |
| 20 | 1550401 |
| 21 | 3959335 |
| 22 | 10155615 |
| 23 | 26182267 |
| 24 | 67753907 |
| 25 | 175713561 |
| 26 | 456422121 |
| 27 | 1187771521 |
| 28 | 3097869841 |
| 29 | 8097629671 |
| 30 | 21207212047 |
| 31 | 55628797891 |
| 32 | 146129168651 |
| 33 | 384401493333 |
| 34 | 1012608918421 |