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 | 3 |
| 4 | 1 |
| 5 | 1 |
| 6 | 15 |
| 7 | 9 |
| 8 | 1 |
| 9 | 1 |
| 10 | 105 |
| 11 | 225 |
| 12 | 27 |
| 13 | 1 |
| 14 | 765765 |
| 15 | 405810405 |
| 16 | 91398648466125 |
| 17 | 48049812916875 |
| 18 | 1033788065625 |
| 19 | 89339709375 |
| 20 | 3796875 |
| 21 | 729 |
| 22 | 1 |
| 23 | 1 |
| 24 | 1 |
| 25 | 315 |
| 26 | 11025 |
| 27 | 3375 |
| 28 | 27 |
| 29 | 1 |
| 30 | 1 |
| 31 | 3465 |
| 32 | 99225 |
| 33 | 1157625 |
| 34 | 16875 |
| 35 | 81 |
| 36 | 1 |
| 37 | 1 |
| 38 | 45045 |
| 39 | 12006225 |
| 40 | 31255875 |
| 41 | 40516875 |
| 42 | 253125 |
| 43 | 243 |
| 44 | 1 |
| 45 | 1 |
| 46 | 45045 |
| 47 | 2029052025 |