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 | 11 |
| 2 | 119 |
| 3 | 1289 |
| 4 | 13961 |
| 5 | 151211 |
| 6 | 1637759 |
| 7 | 17738489 |
| 8 | 192124721 |
| 9 | 2080893611 |
| 10 | 22538058599 |
| 11 | 244108628489 |
| 12 | 2643928812281 |
| 13 | 28636265779211 |
| 14 | 310158017102639 |
| 15 | 3359306563039289 |
| 16 | 36384487784316641 |
| 17 | 394078636910520011 |
| 18 | 4268246759164049879 |
| 19 | 46229175323835178889 |