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 | 1624 |
| 2 | 380074 |
| 3 | 30488976 |
| 4 | 1117791544 |
| 5 | 21911472464 |
| 6 | 259172461296 |
| 7 | 2081117152992 |
| 8 | 12613606876714 |
| 9 | 61865177248552 |
| 10 | 256462892399504 |
| 11 | 928859670458448 |
| 12 | 3006249397711056 |
| 13 | 8858986222461872 |
| 14 | 24088488255932096 |
| 15 | 61146089973555552 |
| 16 | 146117613009432632 |
| 17 | 331281589561600160 |