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 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 0 |
| 6 | 1 |
| 7 | 6 |
| 8 | 6 |
| 9 | 2 |
| 10 | 1 |
| 11 | 24 |
| 12 | 132 |
| 13 | 176 |
| 14 | 24 |
| 15 | 1 |
| 16 | 60 |
| 17 | 960 |
| 18 | 4580 |
| 19 | 5040 |
| 20 | 552 |
| 21 | 1 |
| 22 | 120 |
| 23 | 4260 |
| 24 | 52960 |
| 25 | 213000 |
| 26 | 206592 |
| 27 | 21280 |
| 28 | 1 |
| 29 | 210 |
| 30 | 14070 |
| 31 | 368830 |
| 32 | 3762360 |
| 33 | 13109712 |
| 34 | 11404960 |
| 35 | 1073160 |