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 | 243 |
| 1 | 248832 |
| 2 | 4084101 |
| 3 | 24300000 |
| 4 | 90224199 |
| 5 | 254803968 |
| 6 | 601692057 |
| 7 | 1252332576 |
| 8 | 2373046875 |
| 9 | 4182119424 |
| 10 | 6956883693 |
| 11 | 11040808032 |
| 12 | 16850581551 |
| 13 | 24883200000 |
| 14 | 35723051649 |
| 15 | 50049003168 |
| 16 | 68641485507 |
| 17 | 92389579776 |
| 18 | 122298103125 |
| 19 | 159494694624 |
| 20 | 205236901143 |
| 21 | 260919263232 |