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 | 4 |
| 3 | 84 |
| 4 | 560 |
| 5 | 2300 |
| 6 | 7140 |
| 7 | 18424 |
| 8 | 41664 |
| 9 | 85320 |
| 10 | 161700 |
| 11 | 287980 |
| 12 | 487344 |
| 13 | 790244 |
| 14 | 1235780 |
| 15 | 1873200 |
| 16 | 2763520 |
| 17 | 3981264 |
| 18 | 5616324 |
| 19 | 7775940 |
| 20 | 10586800 |
| 21 | 14197260 |
| 22 | 18779684 |
| 23 | 24532904 |
| 24 | 31684800 |
| 25 | 40495000 |
| 26 | 51257700 |
| 27 | 64304604 |
| 28 | 80007984 |
| 29 | 98783860 |
| 30 | 121095300 |
| 31 | 147455840 |
| 32 | 178433024 |