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 | 0 |
| 1 | 0 |
| 2 | 128 |
| 3 | 3072 |
| 4 | 49152 |
| 5 | 655360 |
| 6 | 7864320 |
| 7 | 88080384 |
| 8 | 939524096 |
| 9 | 9663676416 |
| 10 | 96636764160 |
| 11 | 944892805120 |
| 12 | 9070970929152 |
| 13 | 85761906966528 |
| 14 | 800444465020928 |
| 15 | 7388718138654720 |
| 16 | 67553994410557440 |
| 17 | 612489549322387456 |