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) |
|---|---|
| 5 | 1 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 42 |
| 11 | 132 |
| 12 | 297 |
| 13 | 572 |
| 14 | 1001 |
| 15 | 7644 |
| 16 | 38584 |
| 17 | 227460 |
| 18 | 880668 |
| 19 | 3560106 |
| 20 | 13136733 |
| 21 | 53948258 |
| 22 | 260567615 |
| 23 | 1322074776 |
| 24 | 7132302760 |
| 25 | 36927209090 |
| 26 | 189472194730 |
| 27 | 965322122310 |
| 28 | 4935547435455 |
| 29 | 26391699530094 |
| 30 | 143808787394511 |
| 31 | 824237501959916 |
| 32 | 4756694235326336 |