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 | 1002 |
| 4 | 11750 |
| 5 | 106752 |
| 6 | 794598 |
| 7 | 5025692 |
| 8 | 27717948 |
| 9 | 135916002 |
| 10 | 601585512 |
| 11 | 2432878866 |
| 12 | 9079799742 |
| 13 | 31534801116 |
| 14 | 102644594262 |
| 15 | 315029394792 |
| 16 | 916470530808 |
| 17 | 2538818182782 |
| 18 | 6724224543708 |
| 19 | 17088309885542 |
| 20 | 41800229045610 |
| 21 | 98698280879352 |
| 22 | 225524301678170 |