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 | 8 |
| 2 | 32 |
| 3 | 104 |
| 4 | 320 |
| 5 | 968 |
| 6 | 2912 |
| 7 | 8744 |
| 8 | 26240 |
| 9 | 78728 |
| 10 | 236192 |
| 11 | 708584 |
| 12 | 2125760 |
| 13 | 6377288 |
| 14 | 19131872 |
| 15 | 57395624 |
| 16 | 172186880 |
| 17 | 516560648 |
| 18 | 1549681952 |
| 19 | 4649045864 |
| 20 | 13947137600 |
| 21 | 41841412808 |
| 22 | 125524238432 |
| 23 | 376572715304 |
| 24 | 1129718145920 |
| 25 | 3389154437768 |
| 26 | 10167463313312 |