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 | 40 |
| 2 | 1600 |
| 3 | 64000 |
| 4 | 2560000 |
| 5 | 102400000 |
| 6 | 4096000000 |
| 7 | 163840000000 |
| 8 | 6553600000000 |
| 9 | 262144000000000 |
| 10 | 10485760000000000 |
| 11 | 419430400000000000 |
| 12 | 16777216000000000000 |
| 13 | 671088640000000000000 |
| 14 | 26843545600000000000000 |
| 15 | 1073741824000000000000000 |
| 16 | 42949672960000000000000000 |