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 | 14 |
| 2 | 182 |
| 3 | 2366 |
| 4 | 30590 |
| 5 | 395654 |
| 6 | 5110070 |
| 7 | 66009062 |
| 8 | 852194966 |
| 9 | 11002765718 |
| 10 | 142019952830 |
| 11 | 1833202179662 |
| 12 | 23659632189662 |
| 13 | 305360673698150 |
| 14 | 3940760013826454 |
| 15 | 50857078231126286 |
| 16 | 656293571739976142 |
| 17 | 8469305943784113806 |
| 18 | 109290078485661202262 |
| 19 | 1410313416278288850230 |