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 | 1 |
| 5 | 2 |
| 6 | 1 |
| 7 | 1 |
| 8 | 6 |
| 9 | 5 |
| 10 | 1 |
| 11 | 1 |
| 12 | 20 |
| 13 | 57 |
| 14 | 14 |
| 15 | 1 |
| 16 | 1 |
| 17 | 70 |
| 18 | 860 |
| 19 | 678 |
| 20 | 42 |
| 21 | 1 |
| 22 | 1 |
| 23 | 252 |
| 24 | 15225 |
| 25 | 57200 |
| 26 | 9270 |
| 27 | 132 |
| 28 | 1 |
| 29 | 1 |
| 30 | 924 |
| 31 | 299880 |
| 32 | 7043750 |
| 33 | 5344800 |
| 34 | 139968 |
| 35 | 429 |
| 36 | 1 |
| 37 | 1 |
| 38 | 3432 |
| 39 | 6358044 |
| 40 | 1112865264 |
| 41 | 6327749750 |
| 42 | 682612800 |
| 43 | 2285073 |
| 44 | 1430 |
| 45 | 1 |
| 46 | 1 |
| 47 | 12870 |
| 48 | 141858288 |
| 49 | 203356067376 |
| 50 | 11126161436292 |
| 51 | 10411817136000 |
| 52 | 118180104000 |
| 53 | 39871926 |
| 54 | 4862 |