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 | 2 |
| 3 | 4 |
| 4 | 256 |
| 5 | 3126 |
| 6 | 46662 |
| 7 | 823551 |
| 8 | 134217728 |
| 9 | 3486784402 |
| 10 | 100000000010 |
| 11 | 3138428376733 |
| 12 | 115909305827328 |
| 13 | 4240251492291543 |
| 14 | 166680102383370254 |
| 15 | 7006302246093750016 |