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 | 2 |
| 2 | 10 |
| 3 | 163 |
| 4 | 5945 |
| 5 | 375819 |
| 6 | 36233754 |
| 7 | 4932046435 |
| 8 | 899372990826 |
| 9 | 211481102358562 |
| 10 | 62283285977509563 |
| 11 | 22451501854089680715 |
| 12 | 9722649026348549481236 |
| 13 | 4980474318644453218716459 |