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) |
|---|---|
| 11 | 1 |
| 12 | 12 |
| 13 | 78 |
| 14 | 364 |
| 15 | 1365 |
| 16 | 4368 |
| 17 | 12376 |
| 18 | 31824 |
| 19 | 75582 |
| 20 | 167960 |
| 21 | 352716 |
| 22 | 705432 |
| 23 | 1352078 |
| 24 | 2496144 |
| 25 | 4457400 |
| 26 | 7726160 |
| 27 | 13037895 |
| 28 | 21474180 |
| 29 | 34597290 |
| 30 | 54627300 |
| 31 | 84672315 |
| 32 | 129024480 |
| 33 | 193536720 |
| 34 | 286097760 |
| 35 | 417225900 |
| 36 | 600805296 |
| 37 | 854992152 |
| 38 | 1203322288 |
| 39 | 1676056044 |