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 | 120 |
| 2 | 945 |
| 3 | 3640 |
| 4 | 9945 |
| 5 | 22176 |
| 6 | 43225 |
| 7 | 76560 |
| 8 | 126225 |
| 9 | 196840 |
| 10 | 293601 |
| 11 | 422280 |
| 12 | 589225 |
| 13 | 801360 |
| 14 | 1066185 |
| 15 | 1391776 |
| 16 | 1786785 |
| 17 | 2260440 |
| 18 | 2822545 |
| 19 | 3483480 |
| 20 | 4254201 |
| 21 | 5146240 |
| 22 | 6171705 |
| 23 | 7343280 |
| 24 | 8674225 |
| 25 | 10178376 |
| 26 | 11870145 |
| 27 | 13764520 |
| 28 | 15877065 |
| 29 | 18223920 |
| 30 | 20821801 |
| 31 | 23688000 |