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 | 1 |
| 1 | 8 |
| 2 | 192 |
| 3 | 512 |
| 4 | 61440 |
| 5 | 32768 |
| 6 | 5505024 |
| 7 | 2097152 |
| 8 | 251658240 |
| 9 | 134217728 |
| 10 | 35433480192 |
| 11 | 8589934592 |
| 12 | 93802085744640 |
| 13 | 549755813888 |
| 14 | 13194139533312 |
| 15 | 35184372088832 |
| 16 | 71776119061217280 |
| 17 | 2251799813685248 |
| 18 | 7187745005283311616 |