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 | 6 |
| 3 | 36 |
| 4 | 192 |
| 5 | 3125 |
| 6 | 3888 |
| 7 | 941192 |
| 8 | 12582912 |
| 9 | 516560652 |
| 10 | 7500000000 |
| 11 | 259374246010 |
| 12 | 743008370688 |
| 13 | 163086595857367 |
| 14 | 1190572159881216 |
| 15 | 583858520507812500 |
| 16 | 13835058055282163712 |
| 17 | 437950726881001816329 |
| 18 | 3278867339608044797952 |
| 19 | 1874292305362402347591138 |
| 20 | 78643200000000000000000000 |
| 21 | 2225747435575612389097571208 |