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 | 0 |
| 7 | 0 |
| 8 | 14 |
| 9 | 126 |
| 10 | 630 |
| 11 | 2310 |
| 12 | 6930 |
| 13 | 18018 |
| 14 | 42042 |
| 15 | 90090 |
| 16 | 180180 |
| 17 | 340340 |
| 18 | 612612 |
| 19 | 1058148 |
| 20 | 1763580 |
| 21 | 2848860 |
| 22 | 4476780 |
| 23 | 6864396 |
| 24 | 10296594 |
| 25 | 15142050 |
| 26 | 21871850 |
| 27 | 31081050 |
| 28 | 43513470 |
| 29 | 60090030 |
| 30 | 81940950 |
| 31 | 110442150 |
| 32 | 147256200 |
| 33 | 194378184 |
| 34 | 254186856 |
| 35 | 329501480 |