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 | 1 |
| 2 | 7 |
| 3 | 88 |
| 4 | 1686 |
| 5 | 44746 |
| 6 | 1550780 |
| 7 | 67381560 |
| 8 | 3562868722 |
| 9 | 224113484498 |
| 10 | 16473080538422 |
| 11 | 1394549071911392 |
| 12 | 134354292707375708 |
| 13 | 14583554691197056644 |
| 14 | 1768268298908733087440 |
| 15 | 237735747822259634293456 |
| 16 | 35212913676142942896961116 |