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) |
|---|---|
| 6 | 3 |
| 7 | 53 |
| 8 | 680 |
| 9 | 8064 |
| 10 | 96370 |
| 11 | 1200070 |
| 12 | 15778800 |
| 13 | 220047400 |
| 14 | 3257228485 |
| 15 | 51125192475 |
| 16 | 849388162448 |
| 17 | 14905775547488 |
| 18 | 275697902983860 |
| 19 | 5362979000259804 |
| 20 | 109488815508733440 |
| 21 | 2341353038132316240 |
| 22 | 52346701837709016375 |
| 23 | 1221458048752142672625 |
| 24 | 29697803502485749344120 |
| 25 | 751211166036942984639200 |