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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 24 |
| 4 | 102 |
| 5 | 252 |
| 6 | 504 |
| 7 | 867 |
| 8 | 1431 |
| 9 | 2214 |
| 10 | 3228 |
| 11 | 4509 |
| 12 | 6237 |
| 13 | 8481 |
| 14 | 11259 |
| 15 | 14445 |
| 16 | 18261 |
| 17 | 22935 |
| 18 | 28497 |
| 19 | 34980 |
| 20 | 42762 |
| 21 | 51708 |
| 22 | 61632 |
| 23 | 72795 |
| 24 | 85791 |
| 25 | 100611 |
| 26 | 117027 |
| 27 | 134874 |
| 28 | 154836 |
| 29 | 177402 |
| 30 | 202548 |
| 31 | 230355 |
| 32 | 261543 |
| 33 | 295707 |
| 34 | 332271 |
| 35 | 371313 |
| 36 | 413937 |
| 37 | 460881 |
| 38 | 511551 |