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 | 1 |
| 2 | 3 |
| 3 | 10 |
| 4 | 24 |
| 5 | 59 |
| 6 | 136 |
| 7 | 309 |
| 8 | 682 |
| 9 | 1493 |
| 10 | 3223 |
| 11 | 6904 |
| 12 | 14675 |
| 13 | 31013 |
| 14 | 65202 |
| 15 | 136512 |
| 16 | 284748 |
| 17 | 592082 |
| 18 | 1227709 |
| 19 | 2539516 |
| 20 | 5241640 |
| 21 | 10798133 |
| 22 | 22206568 |
| 23 | 45597489 |
| 24 | 93495667 |
| 25 | 191464970 |
| 26 | 391636718 |
| 27 | 800233551 |
| 28 | 1633530732 |
| 29 | 3331568080 |
| 30 | 6789078236 |
| 31 | 13824212219 |
| 32 | 28129459098 |