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 | 5 |
| 2 | 211 |
| 3 | 4327 |
| 4 | 4547 |
| 5 | 25523 |
| 6 | 81611 |
| 7 | 966109 |
| 8 | 1654111 |
| 9 | 3851587 |
| 10 | 1895479 |
| 11 | 66407189 |
| 12 | 134965049 |
| 13 | 129312889 |
| 14 | 425845151 |
| 15 | 35914507 |
| 16 | 504365461 |
| 17 | 2400397969 |
| 18 | 8490141637 |
| 19 | 8429770031 |
| 20 | 20416021309 |
| 21 | 23555107819 |
| 22 | 23912414437 |