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 | 65 |
| 2 | 2540 |
| 3 | 77350 |
| 4 | 2022951 |
| 5 | 47708115 |
| 6 | 1043778730 |
| 7 | 21572322200 |
| 8 | 426384404501 |
| 9 | 8130687730165 |
| 10 | 150551375530920 |
| 11 | 2720251171051050 |
| 12 | 48146139744079651 |
| 13 | 837259855674756215 |
| 14 | 14340645378939543110 |