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) |
|---|---|
| 5 | 1 |
| 6 | 0 |
| 7 | 21 |
| 8 | 112 |
| 9 | 1134 |
| 10 | 11088 |
| 11 | 122430 |
| 12 | 1468368 |
| 13 | 19090071 |
| 14 | 267258992 |
| 15 | 4008887883 |
| 16 | 64142201760 |
| 17 | 1090417436108 |
| 18 | 19627513841376 |
| 19 | 372922762997772 |
| 20 | 7458455259939936 |
| 21 | 156627560458759005 |
| 22 | 3445806330092671776 |
| 23 | 79253545592131484497 |
| 24 | 1902085094211155585424 |