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 | 11 |
| 6 | 31 |
| 7 | 98 |
| 8 | 317 |
| 9 | 1070 |
| 10 | 3685 |
| 11 | 12928 |
| 12 | 45924 |
| 13 | 164552 |
| 14 | 593398 |
| 15 | 2148288 |
| 16 | 7796846 |
| 17 | 28328601 |
| 18 | 102948125 |
| 19 | 373955584 |
| 20 | 1357252616 |
| 21 | 4921292287 |
| 22 | 17828236695 |
| 23 | 64546901169 |
| 24 | 233660589210 |
| 25 | 846258569786 |
| 26 | 3068523234989 |
| 27 | 11147449003438 |
| 28 | 40600425590874 |
| 29 | 148330067463010 |