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) |
|---|---|
| 2 | 2 |
| 3 | 12 |
| 4 | 202 |
| 5 | 9468 |
| 6 | 836017 |
| 7 | 111255228 |
| 8 | 20433309147 |
| 9 | 4940118795869 |
| 10 | 1520564059349452 |
| 11 | 580578894859915650 |
| 12 | 269291841184184374868 |
| 13 | 149146250420586942401004 |
| 14 | 97222048664558428304285193 |
| 15 | 73681349947834075264704425280 |
| 16 | 64240926985765124116695616020874 |
| 17 | 63847923667734462963941294951243328 |