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) |
|---|---|
| 8 | 1 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 1430 |
| 17 | 4862 |
| 18 | 11934 |
| 19 | 25194 |
| 20 | 48450 |
| 21 | 87210 |
| 22 | 149226 |
| 23 | 245157 |
| 24 | 23761001 |
| 25 | 159952925 |
| 26 | 1105745355 |
| 27 | 4877504775 |
| 28 | 21957739245 |
| 29 | 79151445945 |
| 30 | 291770177400 |
| 31 | 934243294725 |
| 32 | 4553273607924 |
| 33 | 25467623215188 |
| 34 | 210714037216628 |
| 35 | 1472412825136220 |