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) |
|---|---|
| 2 | 0 |
| 3 | 6 |
| 4 | 40 |
| 5 | 210 |
| 6 | 681 |
| 7 | 1919 |
| 8 | 4443 |
| 9 | 9481 |
| 10 | 18206 |
| 11 | 33164 |
| 12 | 56570 |
| 13 | 92996 |
| 14 | 146175 |
| 15 | 223565 |
| 16 | 330981 |
| 17 | 479779 |
| 18 | 678508 |
| 19 | 943586 |
| 20 | 1287036 |
| 21 | 1731654 |
| 22 | 2293765 |
| 23 | 3004011 |
| 24 | 3883935 |
| 25 | 4973645 |
| 26 | 6300906 |
| 27 | 7917064 |
| 28 | 9857198 |
| 29 | 12185816 |
| 30 | 14946491 |
| 31 | 18218969 |
| 32 | 22056585 |
| 33 | 26556551 |
| 34 | 31783320 |