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 | 72 |
| 2 | 1332 |
| 3 | 11832 |
| 4 | 66222 |
| 5 | 271224 |
| 6 | 889716 |
| 7 | 2476296 |
| 8 | 6077196 |
| 9 | 13507416 |
| 10 | 27717948 |
| 11 | 53265960 |
| 12 | 96900810 |
| 13 | 168278760 |
| 14 | 280819260 |
| 15 | 452715672 |
| 16 | 708113304 |
| 17 | 1078467624 |
| 18 | 1604095524 |
| 19 | 2335932504 |
| 20 | 3337508646 |
| 21 | 4687156248 |
| 22 | 6480461988 |
| 23 | 8832976488 |
| 24 | 11883194148 |
| 25 | 15795816120 |