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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 14 |
| 6 | 37 |
| 7 | 92 |
| 8 | 236 |
| 9 | 596 |
| 10 | 1517 |
| 11 | 3846 |
| 12 | 9770 |
| 13 | 24794 |
| 14 | 62953 |
| 15 | 159800 |
| 16 | 405688 |
| 17 | 1029864 |
| 18 | 2614457 |
| 19 | 6637066 |
| 20 | 16849006 |
| 21 | 42773094 |
| 22 | 108584525 |
| 23 | 275654292 |
| 24 | 699780452 |
| 25 | 1776473532 |
| 26 | 4509783909 |
| 27 | 11448608270 |
| 28 | 29063617746 |
| 29 | 73781357746 |
| 30 | 187302518353 |
| 31 | 475489124976 |
| 32 | 1207084188912 |