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 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 5 |
| 6 | 10 |
| 7 | 22 |
| 8 | 46 |
| 9 | 148 |
| 10 | 324 |
| 11 | 722 |
| 12 | 1843 |
| 13 | 4634 |
| 14 | 12537 |
| 15 | 34248 |
| 16 | 95711 |
| 17 | 266761 |
| 18 | 724689 |
| 19 | 1983267 |
| 20 | 5553902 |
| 21 | 15900083 |
| 22 | 46201546 |
| 23 | 135511171 |
| 24 | 400668869 |
| 25 | 1189723253 |
| 26 | 3535186203 |
| 27 | 10516298421 |
| 28 | 31405658622 |
| 29 | 94378367065 |
| 30 | 285623516777 |
| 31 | 870481565252 |
| 32 | 2671088133010 |