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 | 6 |
| 2 | 64 |
| 3 | 616 |
| 4 | 5936 |
| 5 | 57408 |
| 6 | 554624 |
| 7 | 5359040 |
| 8 | 51781696 |
| 9 | 500337216 |
| 10 | 4834483264 |
| 11 | 46712942656 |
| 12 | 451361370176 |
| 13 | 4361255727168 |
| 14 | 42140406169664 |
| 15 | 407179478511680 |
| 16 | 3934350491492416 |
| 17 | 38015456589811776 |
| 18 | 367322368167936064 |
| 19 | 3549233239845138496 |
| 20 | 34294281215843786816 |