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 | 0 |
| 2 | 12 |
| 3 | 163 |
| 4 | 1881 |
| 5 | 20192 |
| 6 | 210678 |
| 7 | 2167602 |
| 8 | 22119050 |
| 9 | 224575958 |
| 10 | 2272470765 |
| 11 | 22940965468 |
| 12 | 231196012323 |
| 13 | 2326967172345 |
| 14 | 23397529032871 |
| 15 | 235077714312816 |
| 16 | 2360380827753871 |
| 17 | 23688221418030854 |
| 18 | 237630022854838725 |
| 19 | 2382971166321456083 |
| 20 | 23889590198589663868 |