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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 10 |
| 7 | 70 |
| 8 | 280 |
| 9 | 840 |
| 10 | 2100 |
| 11 | 4620 |
| 12 | 9240 |
| 13 | 17160 |
| 14 | 30030 |
| 15 | 50050 |
| 16 | 80080 |
| 17 | 123760 |
| 18 | 185640 |
| 19 | 271320 |
| 20 | 387600 |
| 21 | 542640 |
| 22 | 746130 |
| 23 | 1009470 |
| 24 | 1345960 |
| 25 | 1771000 |
| 26 | 2302300 |
| 27 | 2960100 |
| 28 | 3767400 |
| 29 | 4750200 |
| 30 | 5937750 |
| 31 | 7362810 |
| 32 | 9061920 |
| 33 | 11075680 |
| 34 | 13449040 |
| 35 | 16231600 |
| 36 | 19477920 |