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 | 2 |
| 2 | 2 |
| 3 | 6 |
| 4 | 2 |
| 5 | 18 |
| 6 | 2 |
| 7 | 46 |
| 8 | 14 |
| 9 | 126 |
| 10 | 2 |
| 11 | 454 |
| 12 | 2 |
| 13 | 1266 |
| 14 | 134 |
| 15 | 4222 |
| 16 | 2 |
| 17 | 14202 |
| 18 | 2 |
| 19 | 46406 |
| 20 | 1274 |
| 21 | 155502 |
| 22 | 2 |
| 23 | 531790 |
| 24 | 122 |
| 25 | 1792810 |
| 26 | 13802 |
| 27 | 6126334 |
| 28 | 2 |
| 29 | 21032794 |
| 30 | 2 |
| 31 | 72121854 |
| 32 | 155510 |
| 33 | 248396798 |
| 34 | 1382 |
| 35 | 857944150 |
| 36 | 2 |
| 37 | 2964896882 |
| 38 | 1792818 |
| 39 | 10269600622 |