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 | 0 |
| 17 | 9 |
| 18 | 334 |
| 19 | 4230 |
| 20 | 27453 |
| 21 | 110754 |
| 22 | 316062 |
| 23 | 712689 |
| 24 | 1412301 |
| 25 | 2682846 |
| 26 | 5102356 |
| 27 | 9801586 |
| 28 | 19171774 |
| 29 | 41495990 |
| 30 | 137929830 |
| 31 | 836146663 |
| 32 | 6014616953 |
| 33 | 39197383611 |
| 34 | 220664327140 |
| 35 | 1082883615537 |
| 36 | 4718484209429 |
| 37 | 18595946630434 |
| 38 | 67418929164918 |