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 | 10 |
| 3 | 58 |
| 4 | 722 |
| 5 | 19826 |
| 6 | 1161882 |
| 7 | 141436842 |
| 8 | 35192653666 |
| 9 | 17733070720738 |
| 10 | 17997787816364330 |
| 11 | 36678689328450847514 |
| 12 | 149831453090755680149490 |
| 13 | 1225618861520566592060441682 |
| 14 | 20064594684596858150355969600442 |
| 15 | 657195622713393693107201875915723402 |