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 | 3 |
| 2 | 33 |
| 3 | 721 |
| 4 | 23649 |
| 5 | 1032801 |
| 6 | 56317969 |
| 7 | 3682424775 |
| 8 | 280767441537 |
| 9 | 24456613613401 |
| 10 | 2395993939827201 |
| 11 | 260764460901476643 |
| 12 | 31213273328323059169 |
| 13 | 4075382667781540713807 |
| 14 | 576394007453263029232497 |