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 | 0 |
| 1 | 0 |
| 2 | 56 |
| 3 | 702 |
| 4 | 4032 |
| 5 | 15500 |
| 6 | 46440 |
| 7 | 117306 |
| 8 | 261632 |
| 9 | 530712 |
| 10 | 999000 |
| 11 | 1770230 |
| 12 | 2984256 |
| 13 | 4824612 |
| 14 | 7526792 |
| 15 | 11387250 |
| 16 | 16773120 |
| 17 | 24132656 |
| 18 | 34006392 |
| 19 | 47039022 |
| 20 | 63992000 |
| 21 | 85756860 |
| 22 | 113369256 |
| 23 | 148023722 |
| 24 | 191089152 |
| 25 | 244125000 |
| 26 | 308898200 |
| 27 | 387400806 |
| 28 | 481868352 |
| 29 | 594798932 |