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 | 0 |
| 1 | 6 |
| 2 | 48 |
| 3 | 126 |
| 4 | 240 |
| 5 | 390 |
| 6 | 576 |
| 7 | 798 |
| 8 | 1056 |
| 9 | 1350 |
| 10 | 1680 |
| 11 | 2046 |
| 12 | 2448 |
| 13 | 2886 |
| 14 | 3360 |
| 15 | 3870 |
| 16 | 4416 |
| 17 | 4998 |
| 18 | 5616 |
| 19 | 6270 |
| 20 | 6960 |
| 21 | 7686 |
| 22 | 8448 |
| 23 | 9246 |
| 24 | 10080 |
| 25 | 10950 |
| 26 | 11856 |
| 27 | 12798 |
| 28 | 13776 |
| 29 | 14790 |
| 30 | 15840 |
| 31 | 16926 |
| 32 | 18048 |
| 33 | 19206 |
| 34 | 20400 |
| 35 | 21630 |
| 36 | 22896 |
| 37 | 24198 |
| 38 | 25536 |
| 39 | 26910 |
| 40 | 28320 |
| 41 | 29766 |