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 | 2 |
| 2 | 9 |
| 3 | 82 |
| 4 | 1025 |
| 5 | 15626 |
| 6 | 279937 |
| 7 | 5764802 |
| 8 | 134217729 |
| 9 | 3486784402 |
| 10 | 100000000001 |
| 11 | 3138428376722 |
| 12 | 106993205379073 |
| 13 | 3937376385699290 |
| 14 | 155568095557812225 |
| 15 | 6568408355712890626 |
| 16 | 295147905179352825857 |
| 17 | 14063084452067724991010 |