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 | 2 |
| 2 | 60 |
| 3 | 390 |
| 4 | 2146 |
| 5 | 5324 |
| 6 | 16042 |
| 7 | 28916 |
| 8 | 71012 |
| 9 | 121678 |
| 10 | 216768 |
| 11 | 302470 |
| 12 | 606282 |
| 13 | 785548 |