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) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 174 |
| 4 | 1998 |
| 5 | 10741 |
| 6 | 38438 |
| 7 | 107004 |
| 8 | 251354 |
| 9 | 522528 |
| 10 | 990816 |
| 11 | 1748883 |
| 12 | 2914894 |
| 13 | 4635639 |
| 14 | 7089658 |
| 15 | 10490366 |
| 16 | 15089178 |
| 17 | 21178634 |
| 18 | 29095524 |
| 19 | 39224013 |
| 20 | 51998766 |