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 | 36 |
| 3 | 780 |
| 4 | 14196 |
| 5 | 4017156 |
| 6 | 65514540 |
| 7 | 17050729020 |
| 8 | 273715645476 |
| 9 | 70274600998836 |
| 10 | 288161745774346860 |
| 11 | 4611068345031103956 |
| 12 | 18889015647572689857420 |
| 13 | 4835666805462139528038300 |
| 14 | 77370924198368872644117636 |
| 15 | 19807014039751725440882699796 |