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 | 15 |
| 3 | 1 |
| 4 | 275 |
| 5 | 30 |
| 6 | 1 |
| 7 | 5500 |
| 8 | 775 |
| 9 | 45 |
| 10 | 1 |
| 11 | 115500 |
| 12 | 19250 |
| 13 | 1500 |
| 14 | 60 |
| 15 | 1 |
| 16 | 2502500 |
| 17 | 471625 |
| 18 | 44625 |
| 19 | 2450 |
| 20 | 75 |
| 21 | 1 |
| 22 | 55412500 |
| 23 | 11495000 |
| 24 | 1254000 |
| 25 | 85000 |
| 26 | 3625 |
| 27 | 90 |
| 28 | 1 |
| 29 | 1246781250 |
| 30 | 279675000 |
| 31 | 34093125 |
| 32 | 2698875 |
| 33 | 143750 |
| 34 | 5025 |
| 35 | 105 |
| 36 | 1 |
| 37 | 28398906250 |
| 38 | 6802812500 |