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 | 1 |
| 4 | 6 |
| 5 | 24 |
| 6 | 77 |
| 7 | 216 |
| 8 | 552 |
| 9 | 1315 |
| 10 | 2964 |
| 11 | 6387 |
| 12 | 13255 |
| 13 | 26640 |
| 14 | 52074 |
| 15 | 99336 |
| 16 | 185430 |
| 17 | 339483 |
| 18 | 610709 |
| 19 | 1081227 |
| 20 | 1886484 |
| 21 | 3247502 |
| 22 | 5521365 |
| 23 | 9279624 |
| 24 | 15429149 |
| 25 | 25397088 |
| 26 | 41412030 |
| 27 | 66928700 |
| 28 | 107265576 |
| 29 | 170556654 |
| 30 | 269164346 |
| 31 | 421765920 |
| 32 | 656419080 |
| 33 | 1015044526 |
| 34 | 1559950185 |
| 35 | 2383284894 |