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 | 3 |
| 5 | 1 |
| 6 | 5 |
| 7 | 1 |
| 8 | 105 |
| 9 | 35 |
| 10 | 7 |
| 11 | 1 |
| 12 | 385 |
| 13 | 1 |
| 14 | 143 |
| 15 | 1001 |
| 16 | 15015 |
| 17 | 1 |
| 18 | 85085 |
| 19 | 1 |
| 20 | 323323 |
| 21 | 46189 |
| 22 | 4199 |
| 23 | 1 |
| 24 | 37182145 |
| 25 | 7436429 |
| 26 | 7429 |
| 27 | 37182145 |
| 28 | 1062347 |
| 29 | 1 |
| 30 | 215656441 |
| 31 | 1 |
| 32 | 100280245065 |
| 33 | 86822723 |
| 34 | 392863 |
| 35 | 955049953 |
| 36 | 33426748355 |
| 37 | 1 |
| 38 | 765049 |
| 39 | 247110827 |
| 40 | 247357937827 |
| 41 | 1 |
| 42 | 1448810778701 |
| 43 | 1 |