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 | 1 |
| 2 | 64 |
| 3 | 800 |
| 4 | 1452 |
| 5 | 207143 |
| 6 | 14934568 |
| 7 | 18656679 |
| 8 | 42721785 |
| 9 | 889239450 |
| 10 | 1991045973 |
| 11 | 6684665064 |
| 12 | 11847007536 |
| 13 | 127880982508860 |
| 14 | 262907426075600 |
| 15 | 435646635220423 |
| 16 | 58536266213035868 |
| 17 | 1777764795352216572 |
| 18 | 5690843954660983949 |
| 19 | 190101452851104748107 |
| 20 | 71537286176000166753366 |