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 | 46 |
| 2 | 2070 |
| 3 | 93150 |
| 4 | 4190715 |
| 5 | 188535600 |
| 6 | 8482007160 |
| 7 | 381596054400 |
| 8 | 17167581467190 |
| 9 | 772350369021000 |
| 10 | 34747182860785560 |
| 11 | 1563237055602189000 |
| 12 | 70328294002955286540 |
| 13 | 3163991615757072698400 |
| 14 | 142344458748855549948960 |