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 | 13 |
| 3 | 88 |
| 4 | 951 |
| 5 | 16691 |
| 6 | 484490 |
| 7 | 23701698 |
| 8 | 1990327810 |
| 9 | 291750344191 |
| 10 | 75757923092106 |
| 11 | 35286335933354828 |
| 12 | 29791358931890967248 |
| 13 | 45989706937220594708463 |
| 14 | 130760311958838053647976497 |