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 | 5 |
| 5 | 9 |
| 6 | 10 |
| 7 | 11 |
| 8 | 20 |
| 9 | 30 |
| 10 | 91 |
| 11 | 168 |
| 12 | 1353 |
| 13 | 4810 |
| 14 | 5633 |
| 15 | 18318 |
| 16 | 113469 |
| 17 | 309843 |
| 18 | 2472166 |
| 19 | 8986945 |
| 20 | 14851612 |
| 21 | 37245096 |
| 22 | 126623277 |
| 23 | 303214904 |
| 24 | 332037001 |
| 25 | 471378040 |
| 26 | 2479371748 |
| 27 | 7480271673 |
| 28 | 19360939770 |
| 29 | 63777083760 |
| 30 | 86507687515 |
| 31 | 660840240360 |
| 32 | 705786898152 |