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 | 6 |
| 2 | 42 |
| 3 | 340 |
| 4 | 3136 |
| 5 | 30456 |
| 6 | 307464 |
| 7 | 3182784 |
| 8 | 33588630 |
| 9 | 359679572 |
| 10 | 3896854004 |
| 11 | 42621505752 |
| 12 | 469855280984 |
| 13 | 5214136065200 |
| 14 | 58192269283872 |
| 15 | 652647993512352 |
| 16 | 7351118301680664 |
| 17 | 83112561412246944 |
| 18 | 942832221757264300 |