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 | 22 |
| 2 | 337 |
| 3 | 4120 |
| 4 | 43941 |
| 5 | 426527 |
| 6 | 3875213 |
| 7 | 33540705 |
| 8 | 279734339 |
| 9 | 2266708593 |
| 10 | 17952142360 |
| 11 | 139568672552 |
| 12 | 1068728748298 |
| 13 | 8081450512876 |
| 14 | 60468894195838 |
| 15 | 448444819136394 |
| 16 | 3300666311519663 |
| 17 | 24136833802226245 |
| 18 | 175525144342241365 |