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 | 35 |
| 2 | 1470 |
| 3 | 65170 |
| 4 | 2965235 |
| 5 | 136993857 |
| 6 | 6393046660 |
| 7 | 300473193020 |
| 8 | 14197358370195 |
| 9 | 673585780452585 |
| 10 | 32062683149543046 |
| 11 | 1530264423046372650 |
| 12 | 73197648235718158425 |
| 13 | 3507856526988647130675 |
| 14 | 168377113295455062272400 |
| 15 | 8093326579068206659893360 |
| 16 | 389491341617657445507367950 |