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 | 19 |
| 1 | 20 |
| 2 | 779 |
| 3 | 799 |
| 4 | 31141 |
| 5 | 31940 |
| 6 | 1244861 |
| 7 | 1276801 |
| 8 | 49763299 |
| 9 | 51040100 |
| 10 | 1989287099 |
| 11 | 2040327199 |
| 12 | 79521720661 |
| 13 | 81562047860 |
| 14 | 3178879539341 |
| 15 | 3260441587201 |
| 16 | 127075659852979 |
| 17 | 130336101440180 |
| 18 | 5079847514579819 |
| 19 | 5210183616019999 |
| 20 | 203066824923339781 |