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 | 2 |
| 3 | 0 |
| 4 | 3 |
| 5 | 1 |
| 6 | 2 |
| 7 | 4 |
| 8 | 4 |
| 9 | 16 |
| 10 | 0 |
| 11 | 5 |
| 12 | 10 |
| 13 | 67 |
| 14 | 14 |
| 15 | 24 |
| 16 | 6 |
| 17 | 20 |
| 18 | 202 |
| 19 | 124 |
| 20 | 368 |
| 21 | 0 |
| 22 | 7 |
| 23 | 35 |
| 24 | 497 |
| 25 | 601 |
| 26 | 2736 |
| 27 | 444 |
| 28 | 720 |
| 29 | 8 |
| 30 | 56 |
| 31 | 1064 |
| 32 | 2120 |
| 33 | 13712 |
| 34 | 6464 |
| 35 | 16896 |
| 36 | 0 |
| 37 | 9 |
| 38 | 84 |
| 39 | 2058 |
| 40 | 6096 |
| 41 | 53121 |
| 42 | 48876 |
| 43 | 186732 |
| 44 | 25584 |
| 45 | 40320 |
| 46 | 10 |
| 47 | 120 |
| 48 | 3684 |
| 49 | 15168 |
| 50 | 171258 |
| 51 | 257640 |
| 52 | 1350296 |