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 | 0 |
| 4 | 88 |
| 5 | 785 |
| 6 | 3528 |
| 7 | 11151 |
| 8 | 28560 |
| 9 | 63513 |
| 10 | 127520 |
| 11 | 236863 |
| 12 | 413736 |
| 13 | 687505 |
| 14 | 1096088 |
| 15 | 1687455 |
| 16 | 2521248 |
| 17 | 3670521 |
| 18 | 5223600 |
| 19 | 7286063 |
| 20 | 9982840 |
| 21 | 13460433 |
| 22 | 17889256 |
| 23 | 23466095 |
| 24 | 30416688 |
| 25 | 38998425 |
| 26 | 49503168 |
| 27 | 62260191 |
| 28 | 77639240 |
| 29 | 96053713 |
| 30 | 117963960 |
| 31 | 143880703 |