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 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 44 |
| 6 | 155 |
| 7 | 605 |
| 8 | 2584 |
| 9 | 11956 |
| 10 | 59461 |
| 11 | 315841 |
| 12 | 1782354 |
| 13 | 10638166 |
| 14 | 66900149 |
| 15 | 441811845 |
| 16 | 3055188944 |
| 17 | 22065583000 |
| 18 | 166064430497 |
| 19 | 1299663352309 |
| 20 | 10557811907818 |
| 21 | 88874221415746 |
| 22 | 774053270905621 |
| 23 | 6965452960952961 |