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 | 1 |
| 2 | 18 |
| 3 | 279 |
| 4 | 4 |
| 5 | 68985 |
| 6 | 1094166 |
| 7 | 49 |
| 8 | 264 |
| 9 | 1053 |
| 10 | 1050 |
| 11 | 4191 |
| 12 | 17966487875148 |
| 13 | 65 |
| 14 | 266910 |
| 15 | 73278909191113155 |
| 16 | 16 |
| 17 | 18722068612123127013 |
| 18 | 299304917928357795234 |
| 19 | 265639 |
| 20 | 76514292380672732576340 |
| 21 | 1223491190935287357533961 |
| 22 | 67880230 |
| 23 | 1035 |
| 24 | 17360709912 |
| 25 | 775 |