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 | 14 |
| 8 | 24 |
| 9 | 59 |
| 10 | 108 |
| 11 | 213 |
| 12 | 419 |
| 13 | 808 |
| 14 | 1522 |
| 15 | 2872 |
| 16 | 5366 |
| 17 | 9960 |
| 18 | 18362 |
| 19 | 33660 |
| 20 | 61364 |
| 21 | 111375 |
| 22 | 201273 |
| 23 | 362225 |
| 24 | 649413 |
| 25 | 1160289 |
| 26 | 2066355 |
| 27 | 3668840 |
| 28 | 6495542 |
| 29 | 11469453 |
| 30 | 20201295 |
| 31 | 35496670 |
| 32 | 62233609 |
| 33 | 108878818 |
| 34 | 190103797 |
| 35 | 331292391 |
| 36 | 576296824 |
| 37 | 1000766991 |