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 | 0 |
| 2 | 4 |
| 3 | 76 |
| 4 | 963 |
| 5 | 11185 |
| 6 | 124465 |
| 7 | 1349779 |
| 8 | 14371023 |
| 9 | 150982388 |
| 10 | 1570678136 |
| 11 | 16218372618 |
| 12 | 166497674684 |
| 13 | 1701439985694 |
| 14 | 17323079621014 |
| 15 | 175846040834673 |
| 16 | 1780617141307093 |
| 17 | 17993699600756449 |
| 18 | 181520864946969233 |