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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 24 |
| 7 | 3 |
| 8 | 323 |
| 9 | 5152 |
| 10 | 61 |
| 11 | 5 |
| 12 | 1244196 |
| 13 | 1 |
| 14 | 343394784 |
| 15 | 451 |
| 16 | 96750547245 |
| 17 | 2 |
| 18 | 27691889548848 |
| 19 | 4540398488 |
| 20 | 41602 |
| 21 | 47 |
| 22 | 130912145198673460 |
| 23 | 2246987341515579264 |
| 24 | 6687526825681962 |
| 25 | 3001 |
| 26 | 421 |
| 27 | 616334361134094950448 |