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 | 0 |
| 1 | 1 |
| 2 | 17 |
| 3 | 256 |
| 4 | 3825 |
| 5 | 57121 |
| 6 | 852992 |
| 7 | 12737761 |
| 8 | 190213425 |
| 9 | 2840463616 |
| 10 | 42416740817 |
| 11 | 633410648641 |
| 12 | 9458742988800 |
| 13 | 141247734183361 |
| 14 | 2109257269761617 |
| 15 | 31497611312240896 |
| 16 | 470354912413851825 |
| 17 | 7023826074895536481 |