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 | 6 |
| 2 | 57 |
| 3 | 443 |
| 4 | 1407 |
| 5 | 1410 |
| 6 | 12242 |
| 7 | 15051 |
| 8 | 30952 |
| 9 | 44277 |
| 10 | 65190 |
| 11 | 68697 |
| 12 | 609531 |
| 13 | 921774 |
| 14 | 951092 |
| 15 | 2012670 |
| 16 | 2820460 |
| 17 | 11961680 |
| 18 | 32886944 |
| 19 | 3450005970 |