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 | 22 |
| 2 | 1511 |
| 3 | 90040 |
| 4 | 5493583 |
| 5 | 334056618 |
| 6 | 20324827981 |
| 7 | 1236501116120 |
| 8 | 75226160041933 |
| 9 | 4576591071807054 |
| 10 | 278429681683117411 |
| 11 | 16939044773645481920 |
| 12 | 1030533959174319758227 |
| 13 | 62695402974582513118434 |
| 14 | 3814249420035058238741393 |
| 15 | 232050484511869215926762256 |