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 | 13 |
| 2 | 169 |
| 3 | 1393 |
| 4 | 11227 |
| 5 | 95299 |
| 6 | 816667 |
| 7 | 6951227 |
| 8 | 59040685 |
| 9 | 501829587 |
| 10 | 4267306637 |
| 11 | 36285226037 |
| 12 | 308510297123 |
| 13 | 2623052584859 |
| 14 | 22302344594307 |
| 15 | 189625018122875 |
| 16 | 1612277620195105 |
| 17 | 13708297950194541 |
| 18 | 116554044545138583 |