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 | 1 |
| 3 | 760 |
| 4 | 49682 |
| 5 | 1722320 |
| 6 | 45699447 |
| 7 | 1063783164 |
| 8 | 23119658500 |
| 9 | 484099087156 |
| 10 | 9930487583345 |
| 11 | 201402352998560 |
| 12 | 4059011173618086 |
| 13 | 81520052344904040 |
| 14 | 1634100242397204427 |
| 15 | 32722001111322772660 |
| 16 | 654870005050881521672 |
| 17 | 13102000022780506515884 |