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 | 15 |
| 2 | 85 |
| 3 | 320 |
| 4 | 951 |
| 5 | 2415 |
| 6 | 5475 |
| 7 | 11385 |
| 8 | 22110 |
| 9 | 40612 |
| 10 | 71214 |
| 11 | 120055 |
| 12 | 195650 |
| 13 | 309570 |
| 14 | 477258 |
| 15 | 718998 |
| 16 | 1061055 |
| 17 | 1537005 |
| 18 | 2189275 |
| 19 | 3070914 |
| 20 | 4247617 |
| 21 | 5800025 |
| 22 | 7826325 |
| 23 | 10445175 |
| 24 | 13798980 |
| 25 | 18057546 |
| 26 | 23422140 |