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 | 1 |
| 2 | 12 |
| 3 | 91 |
| 4 | 600 |
| 5 | 3751 |
| 6 | 22932 |
| 7 | 138811 |
| 8 | 836400 |
| 9 | 5028751 |
| 10 | 30203052 |
| 11 | 181308931 |
| 12 | 1088123400 |
| 13 | 6529545751 |
| 14 | 39179682372 |
| 15 | 235085301451 |
| 16 | 1410533397600 |
| 17 | 8463265086751 |
| 18 | 50779784492892 |
| 19 | 304679288612371 |
| 20 | 1828077476115000 |
| 21 | 10968470088963751 |
| 22 | 65810836228506612 |