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) |
|---|---|
| 2 | 6 |
| 3 | 40 |
| 4 | 150 |
| 5 | 420 |
| 6 | 980 |
| 7 | 2016 |
| 8 | 3780 |
| 9 | 6600 |
| 10 | 10890 |
| 11 | 17160 |
| 12 | 26026 |
| 13 | 38220 |
| 14 | 54600 |
| 15 | 76160 |
| 16 | 104040 |
| 17 | 139536 |
| 18 | 184110 |
| 19 | 239400 |
| 20 | 307230 |
| 21 | 389620 |
| 22 | 488796 |
| 23 | 607200 |
| 24 | 747500 |
| 25 | 912600 |
| 26 | 1105650 |
| 27 | 1330056 |
| 28 | 1589490 |
| 29 | 1887900 |
| 30 | 2229520 |
| 31 | 2618880 |
| 32 | 3060816 |
| 33 | 3560480 |
| 34 | 4123350 |
| 35 | 4755240 |
| 36 | 5462310 |