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 | 2 |
| 2 | 6 |
| 3 | 22 |
| 4 | 80 |
| 5 | 268 |
| 6 | 786 |
| 7 | 2016 |
| 8 | 4608 |
| 9 | 9582 |
| 10 | 18446 |
| 11 | 33330 |
| 12 | 57136 |
| 13 | 93704 |
| 14 | 147994 |
| 15 | 226284 |
| 16 | 336384 |
| 17 | 487866 |
| 18 | 692310 |
| 19 | 963566 |
| 20 | 1318032 |
| 21 | 1774948 |
| 22 | 2356706 |
| 23 | 3089176 |
| 24 | 4002048 |
| 25 | 5129190 |
| 26 | 6509022 |
| 27 | 8184906 |
| 28 | 10205552 |
| 29 | 12625440 |
| 30 | 15505258 |
| 31 | 18912356 |
| 32 | 22921216 |