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 | 2 |
| 3 | 6 |
| 4 | 26 |
| 5 | 40 |
| 6 | 94 |
| 7 | 184 |
| 8 | 350 |
| 9 | 496 |
| 10 | 3390 |
| 11 | 3536 |
| 12 | 45370 |
| 13 | 82734 |
| 14 | 99064 |
| 15 | 357164 |
| 16 | 840904 |
| 17 | 3880556 |
| 18 | 27914936 |
| 19 | 40517520 |
| 20 | 104715206 |
| 21 | 1126506904 |
| 22 | 2084910530 |
| 23 | 2442825346 |
| 24 | 4332318176 |
| 25 | 6716598046 |
| 26 | 17736392220 |
| 27 | 18205380336 |
| 28 | 30869303806 |
| 29 | 68506021364 |
| 30 | 78491213264 |
| 31 | 85620067844 |