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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 6 |
| 4 | 32 |
| 5 | 160 |
| 6 | 768 |
| 7 | 3584 |
| 8 | 16384 |
| 9 | 73728 |
| 10 | 327680 |
| 11 | 1441792 |
| 12 | 6291456 |
| 13 | 27262976 |
| 14 | 117440512 |
| 15 | 503316480 |
| 16 | 2147483648 |
| 17 | 9126805504 |
| 18 | 38654705664 |
| 19 | 163208757248 |
| 20 | 687194767360 |
| 21 | 2886218022912 |
| 22 | 12094627905536 |
| 23 | 50577534877696 |
| 24 | 211106232532992 |
| 25 | 879609302220800 |
| 26 | 3659174697238528 |