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 | 3 |
| 2 | 37 |
| 3 | 395 |
| 4 | 4277 |
| 5 | 46251 |
| 6 | 500213 |
| 7 | 5409835 |
| 8 | 58507765 |
| 9 | 632765739 |
| 10 | 6843407605 |
| 11 | 74011952171 |
| 12 | 800444658677 |
| 13 | 8656867341099 |
| 14 | 93624651434741 |
| 15 | 1012557431099947 |
| 16 | 10950882439229941 |
| 17 | 118434591969329451 |
| 18 | 1280878746784164085 |
| 19 | 13852797030687146027 |
| 20 | 149819009843990278133 |