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 | 1 |
| 2 | 18 |
| 3 | 345 |
| 4 | 10243 |
| 5 | 437769 |
| 6 | 25260317 |
| 7 | 1873346813 |
| 8 | 172254143084 |
| 9 | 19114537903943 |
| 10 | 2506628271002200 |
| 11 | 382005168783773474 |
| 12 | 66734799966312471195 |
| 13 | 13212509243902296154744 |
| 14 | 2936153006332857671962341 |
| 15 | 726345521215072990990045577 |
| 16 | 198595552305314906351047196508 |