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 | 12 |
| 2 | 224 |
| 3 | 4608 |
| 4 | 96256 |
| 5 | 2015232 |
| 6 | 42205184 |
| 7 | 883949568 |
| 8 | 18513657856 |
| 9 | 387755016192 |
| 10 | 8121246285824 |
| 11 | 170093589823488 |
| 12 | 3562486393470976 |
| 13 | 74613683694600192 |
| 14 | 1562729279488262144 |
| 15 | 32730226951263879168 |