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 | 2 |
| 1 | 47 |
| 2 | 2207 |
| 3 | 103682 |
| 4 | 4870847 |
| 5 | 228826127 |
| 6 | 10749957122 |
| 7 | 505019158607 |
| 8 | 23725150497407 |
| 9 | 1114577054219522 |
| 10 | 52361396397820127 |
| 11 | 2459871053643326447 |
| 12 | 115561578124838522882 |
| 13 | 5428934300813767249007 |
| 14 | 255044350560122222180447 |