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 | 15 |
| 2 | 1 |
| 3 | 225 |
| 4 | 30 |
| 5 | 1 |
| 6 | 3375 |
| 7 | 675 |
| 8 | 45 |
| 9 | 1 |
| 10 | 50625 |
| 11 | 13500 |
| 12 | 1350 |
| 13 | 60 |
| 14 | 1 |
| 15 | 759375 |
| 16 | 253125 |
| 17 | 33750 |
| 18 | 2250 |
| 19 | 75 |
| 20 | 1 |
| 21 | 11390625 |
| 22 | 4556250 |
| 23 | 759375 |
| 24 | 67500 |
| 25 | 3375 |
| 26 | 90 |
| 27 | 1 |
| 28 | 170859375 |
| 29 | 79734375 |
| 30 | 15946875 |
| 31 | 1771875 |
| 32 | 118125 |
| 33 | 4725 |
| 34 | 105 |
| 35 | 1 |
| 36 | 2562890625 |
| 37 | 1366875000 |
| 38 | 318937500 |
| 39 | 42525000 |
| 40 | 3543750 |
| 41 | 189000 |
| 42 | 6300 |
| 43 | 120 |
| 44 | 1 |