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 | 1 |
| 2 | 36 |
| 3 | 126144 |
| 4 | 236736 |
| 5 | 934902 |
| 6 | 3447632 |
| 7 | 11877300 |
| 8 | 67885860 |
| 9 | 163704304 |
| 10 | 1317560094 |
| 11 | 1483434161 |
| 12 | 5178258504 |
| 13 | 8025266717 |
| 14 | 12097787616 |
| 15 | 16631037162 |
| 16 | 25248156920 |
| 17 | 110341933344 |
| 18 | 145437730020 |
| 19 | 718690577744 |