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 | 1 |
| 2 | 11 |
| 3 | 71 |
| 4 | 1727 |
| 5 | 71218 |
| 6 | 6232542 |
| 7 | 840130123 |
| 8 | 142255064793 |
| 9 | 26089682147964 |
| 10 | 4776270743160543 |
| 11 | 838032011887365999 |
| 12 | 138409456269288832810 |
| 13 | 21380210213948881081642 |
| 14 | 3086290263475796210940632 |