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 | 3 |
| 1 | 13 |
| 2 | 99 |
| 3 | 962 |
| 4 | 10732 |
| 5 | 131715 |
| 6 | 1741813 |
| 7 | 24537945 |
| 8 | 365779679 |
| 9 | 5744911157 |
| 10 | 94786034723 |
| 11 | 1639198623818 |
| 12 | 29658034018852 |
| 13 | 560484305049943 |
| 14 | 11046637024014049 |
| 15 | 226728682400563206 |
| 16 | 4839249231632997924 |
| 17 | 107262821628220974029 |
| 18 | 2465723931357450572707 |