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 | 16 |
| 2 | 146 |
| 3 | 1066 |
| 4 | 6902 |
| 5 | 41506 |
| 6 | 237686 |
| 7 | 1315666 |
| 8 | 7107302 |
| 9 | 37712866 |
| 10 | 197451926 |
| 11 | 1023358066 |
| 12 | 5262831302 |
| 13 | 26903268226 |
| 14 | 136887643766 |
| 15 | 693968021266 |
| 16 | 3508093140902 |
| 17 | 17693879415586 |
| 18 | 89084256837206 |
| 19 | 447884338361266 |
| 20 | 2249284754708102 |
| 21 | 11285908565322946 |
| 22 | 56587579617416246 |