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 | 2 |
| 3 | 2 |
| 4 | 6 |
| 5 | 10 |
| 6 | 19 |
| 7 | 36 |
| 8 | 72 |
| 9 | 135 |
| 10 | 274 |
| 11 | 543 |
| 12 | 1084 |
| 13 | 2219 |
| 14 | 4438 |
| 15 | 9280 |
| 16 | 18570 |
| 17 | 39587 |
| 18 | 79169 |
| 19 | 171369 |
| 20 | 342738 |
| 21 | 751221 |
| 22 | 1502472 |
| 23 | 3328218 |
| 24 | 6656421 |
| 25 | 14878455 |
| 26 | 29756910 |
| 27 | 67030734 |
| 28 | 134061570 |
| 29 | 304036170 |
| 30 | 608072289 |
| 31 | 1387247580 |
| 32 | 2774495160 |