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) |
|---|---|
| 3 | 0 |
| 4 | 1 |
| 5 | 5 |
| 6 | 15 |
| 7 | 42 |
| 8 | 94 |
| 9 | 189 |
| 10 | 340 |
| 11 | 572 |
| 12 | 903 |
| 13 | 1365 |
| 14 | 1981 |
| 15 | 2790 |
| 16 | 3820 |
| 17 | 5117 |
| 18 | 6714 |
| 19 | 8664 |
| 20 | 11005 |
| 21 | 13797 |
| 22 | 17083 |
| 23 | 20930 |
| 24 | 25386 |
| 25 | 30525 |
| 26 | 36400 |
| 27 | 43092 |
| 28 | 50659 |
| 29 | 59189 |
| 30 | 68745 |
| 31 | 79422 |
| 32 | 91288 |
| 33 | 104445 |
| 34 | 118966 |
| 35 | 134960 |
| 36 | 152505 |
| 37 | 171717 |
| 38 | 192679 |
| 39 | 215514 |
| 40 | 240310 |
| 41 | 267197 |
| 42 | 296268 |
| 43 | 327660 |