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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 2 |
| 7 | 4 |
| 8 | 10 |
| 9 | 23 |
| 10 | 49 |
| 11 | 96 |
| 12 | 192 |
| 13 | 368 |
| 14 | 692 |
| 15 | 1299 |
| 16 | 2403 |
| 17 | 4400 |
| 18 | 8029 |
| 19 | 14556 |
| 20 | 26253 |
| 21 | 47206 |
| 22 | 84574 |
| 23 | 151066 |
| 24 | 269244 |
| 25 | 478826 |
| 26 | 849921 |
| 27 | 1506309 |
| 28 | 2665829 |
| 29 | 4711971 |
| 30 | 8319763 |
| 31 | 14675786 |
| 32 | 25865400 |
| 33 | 45552678 |
| 34 | 80171353 |
| 35 | 141015313 |
| 36 | 247905305 |
| 37 | 435614270 |
| 38 | 765132824 |