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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 11 |
| 5 | 34 |
| 6 | 141 |
| 7 | 736 |
| 8 | 4653 |
| 9 | 34842 |
| 10 | 303848 |
| 11 | 3041514 |
| 12 | 34520903 |
| 13 | 439820187 |
| 14 | 6238591638 |
| 15 | 97832195694 |
| 16 | 1685800545944 |
| 17 | 31746373299029 |
| 18 | 650170193047230 |
| 19 | 14418116545259245 |
| 20 | 344857160229381442 |
| 21 | 8865220175506008295 |
| 22 | 244158955254595904415 |
| 23 | 7183277314615065192163 |