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) |
|---|---|
| 0 | -1 |
| 1 | 0 |
| 2 | 15 |
| 3 | 80 |
| 4 | 231 |
| 5 | 504 |
| 6 | 935 |
| 7 | 1560 |
| 8 | 2415 |
| 9 | 3536 |
| 10 | 4959 |
| 11 | 6720 |
| 12 | 8855 |
| 13 | 11400 |
| 14 | 14391 |
| 15 | 17864 |
| 16 | 21855 |
| 17 | 26400 |
| 18 | 31535 |
| 19 | 37296 |
| 20 | 43719 |
| 21 | 50840 |
| 22 | 58695 |
| 23 | 67320 |
| 24 | 76751 |
| 25 | 87024 |
| 26 | 98175 |
| 27 | 110240 |
| 28 | 123255 |
| 29 | 137256 |
| 30 | 152279 |
| 31 | 168360 |