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 | 9 |
| 2 | 322 |
| 3 | 19446 |
| 4 | 1649688 |
| 5 | 180184120 |
| 6 | 24070390992 |
| 7 | 3801662863152 |
| 8 | 692979602529664 |
| 9 | 143184960501077376 |
| 10 | 33069665092749868800 |
| 11 | 8442378658666161822976 |
| 12 | 2360674573114695421197312 |
| 13 | 717531421372546588398529536 |
| 14 | 235551703250624390582942574592 |