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 | 0 |
| 5 | 5 |
| 6 | 6 |
| 7 | 21 |
| 8 | 40 |
| 9 | 93 |
| 10 | 190 |
| 11 | 396 |
| 12 | 796 |
| 13 | 1586 |
| 14 | 3108 |
| 15 | 6025 |
| 16 | 11552 |
| 17 | 21947 |
| 18 | 41346 |
| 19 | 77311 |
| 20 | 143580 |
| 21 | 265013 |
| 22 | 486398 |
| 23 | 888122 |
| 24 | 1613944 |
| 25 | 2920100 |
| 26 | 5261880 |
| 27 | 9445905 |
| 28 | 16897328 |
| 29 | 30127665 |
| 30 | 53552190 |
| 31 | 94915273 |
| 32 | 167771168 |
| 33 | 295794125 |
| 34 | 520254094 |
| 35 | 912962120 |
| 36 | 1598652948 |