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 | 62 |
| 3 | 1270 |
| 4 | 11266 |
| 5 | 63322 |
| 6 | 266748 |
| 7 | 915720 |
| 8 | 2701073 |
| 9 | 7077080 |
| 10 | 16876415 |
| 11 | 37242500 |
| 12 | 77038188 |
| 13 | 150862354 |
| 14 | 281877711 |
| 15 | 505585682 |
| 16 | 874900010 |
| 17 | 1466826558 |
| 18 | 2390947859 |
| 19 | 3799984292 |
| 20 | 5903574820 |
| 21 | 8984255594 |
| 22 | 13418520513 |
| 23 | 19700297034 |
| 24 | 28470461533 |