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) |
|---|---|
| 7 | 0 |
| 8 | 132 |
| 9 | 1287 |
| 10 | 7007 |
| 11 | 28028 |
| 12 | 91728 |
| 13 | 259896 |
| 14 | 659736 |
| 15 | 1534896 |
| 16 | 3325608 |
| 17 | 6789783 |
| 18 | 13180167 |
| 19 | 24496472 |
| 20 | 43835792 |
| 21 | 75869640 |
| 22 | 127481640 |
| 23 | 208606320 |
| 24 | 333316620 |
| 25 | 521215695 |
| 26 | 799197399 |
| 27 | 1203649524 |
| 28 | 1783184480 |
| 29 | 2601993680 |
| 30 | 3743934480 |
| 31 | 5317472160 |
| 32 | 7461614160 |
| 33 | 10352989647 |