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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 5 |
| 6 | 11 |
| 7 | 24 |
| 8 | 52 |
| 9 | 119 |
| 10 | 272 |
| 11 | 635 |
| 12 | 1499 |
| 13 | 3577 |
| 14 | 8614 |
| 15 | 20903 |
| 16 | 51076 |
| 17 | 125565 |
| 18 | 310302 |
| 19 | 770536 |
| 20 | 1921440 |
| 21 | 4809851 |
| 22 | 12081986 |
| 23 | 30445041 |
| 24 | 76938794 |
| 25 | 194950040 |
| 26 | 495174037 |
| 27 | 1260576786 |
| 28 | 3215772264 |
| 29 | 8219437433 |
| 30 | 21046602265 |
| 31 | 53982543827 |
| 32 | 138678541693 |
| 33 | 356785641107 |