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 | 23 |
| 3 | 161 |
| 4 | 1050 |
| 5 | 5971 |
| 6 | 32658 |
| 7 | 187197 |
| 8 | 1057467 |
| 9 | 5495088 |
| 10 | 25862850 |
| 11 | 112452321 |
| 12 | 501114082 |
| 13 | 2867532188 |
| 14 | 21469965415 |
| 15 | 164448147485 |
| 16 | 1116524049413 |
| 17 | 6550885669936 |
| 18 | 33615367021792 |
| 19 | 154093286995596 |
| 20 | 651413912544125 |
| 21 | 2703190211181211 |
| 22 | 12293485890559055 |