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) |
|---|---|
| 7 | 7 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 182 |
| 15 | 420 |
| 16 | 480 |
| 17 | 544 |
| 18 | 612 |
| 19 | 684 |
| 20 | 760 |
| 21 | 9240 |
| 22 | 30030 |
| 23 | 67804 |
| 24 | 115368 |
| 25 | 174000 |
| 26 | 245050 |
| 27 | 329940 |
| 28 | 981288 |
| 29 | 3093720 |
| 30 | 7999650 |
| 31 | 17578860 |
| 32 | 33429408 |
| 33 | 57448512 |
| 34 | 91863750 |
| 35 | 186037460 |
| 36 | 472754520 |
| 37 | 1217599848 |
| 38 | 2884102492 |
| 39 | 6217627260 |
| 40 | 12258776400 |
| 41 | 22412899280 |