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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 5 |
| 5 | 1 |
| 6 | 1 |
| 7 | 26 |
| 8 | 26 |
| 9 | 1 |
| 10 | 1 |
| 11 | 135 |
| 12 | 702 |
| 13 | 135 |
| 14 | 1 |
| 15 | 1 |
| 16 | 701 |
| 17 | 18927 |
| 18 | 18927 |
| 19 | 701 |
| 20 | 1 |
| 21 | 1 |
| 22 | 3640 |
| 23 | 510328 |
| 24 | 2649780 |
| 25 | 510328 |
| 26 | 3640 |
| 27 | 1 |
| 28 | 1 |
| 29 | 18901 |
| 30 | 13759928 |
| 31 | 370988828 |
| 32 | 370988828 |
| 33 | 13759928 |
| 34 | 18901 |
| 35 | 1 |
| 36 | 1 |
| 37 | 98145 |
| 38 | 371007729 |
| 39 | 51941082060 |
| 40 | 269708877956 |