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) |
|---|---|
| 1 | 0 |
| 2 | 93 |
| 3 | 1204 |
| 4 | 23140 |
| 5 | 813473 |
| 6 | 25172836 |
| 7 | 591482528 |
| 8 | 15554895920 |
| 9 | 426023121887 |
| 10 | 11212094301173 |
| 11 | 288664400022091 |
| 12 | 7526121840247476 |
| 13 | 196724860860294913 |
| 14 | 5099876575111214715 |
| 15 | 131971387912281226253 |
| 16 | 3420386371154190796380 |