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 | 1 |
| 2 | 3 |
| 3 | 22 |
| 4 | 262 |
| 5 | 4336 |
| 6 | 91984 |
| 7 | 2381408 |
| 8 | 72800928 |
| 9 | 2566606784 |
| 10 | 102515201984 |
| 11 | 4575271116032 |
| 12 | 225649908491264 |
| 13 | 12187240730230528 |
| 14 | 715392567595403520 |
| 15 | 45349581052869924352 |
| 16 | 3087516727770990992896 |
| 17 | 224691760916830871873536 |