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 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 4 |
| 5 | 12 |
| 6 | 16 |
| 7 | 42 |
| 8 | 60 |
| 9 | 112 |
| 10 | 168 |
| 11 | 310 |
| 12 | 432 |
| 13 | 756 |
| 14 | 1106 |
| 15 | 1722 |
| 16 | 2640 |
| 17 | 4080 |
| 18 | 6062 |
| 19 | 9198 |
| 20 | 13860 |
| 21 | 20300 |
| 22 | 31062 |
| 23 | 45034 |
| 24 | 68340 |
| 25 | 98208 |
| 26 | 149940 |
| 27 | 212576 |
| 28 | 325080 |
| 29 | 458724 |
| 30 | 700128 |
| 31 | 983010 |
| 32 | 1501440 |
| 33 | 2096096 |
| 34 | 3202800 |
| 35 | 4456074 |
| 36 | 6800976 |
| 37 | 9437148 |
| 38 | 14398958 |
| 39 | 19920474 |