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 | 4 |
| 6 | 5 |
| 7 | 18 |
| 8 | 34 |
| 9 | 59 |
| 10 | 132 |
| 11 | 272 |
| 12 | 519 |
| 13 | 966 |
| 14 | 1746 |
| 15 | 3487 |
| 16 | 5986 |
| 17 | 10570 |
| 18 | 19701 |
| 19 | 34444 |
| 20 | 59250 |
| 21 | 101155 |
| 22 | 180588 |
| 23 | 302788 |
| 24 | 515205 |
| 25 | 841042 |
| 26 | 1449392 |
| 27 | 2420163 |
| 28 | 3959442 |
| 29 | 6472636 |
| 30 | 10656987 |
| 31 | 17332640 |
| 32 | 28234296 |
| 33 | 45337971 |
| 34 | 72306544 |
| 35 | 117761744 |
| 36 | 185704091 |
| 37 | 295918788 |
| 38 | 466574348 |