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 | 13 |
| 1 | 44 |
| 2 | 132 |
| 3 | 368 |
| 4 | 976 |
| 5 | 2496 |
| 6 | 6208 |
| 7 | 15104 |
| 8 | 36096 |
| 9 | 84992 |
| 10 | 197632 |
| 11 | 454656 |
| 12 | 1036288 |
| 13 | 2342912 |
| 14 | 5259264 |
| 15 | 11730944 |
| 16 | 26017792 |
| 17 | 57409536 |
| 18 | 126091264 |
| 19 | 275775488 |
| 20 | 600834048 |
| 21 | 1304428544 |
| 22 | 2822766592 |
| 23 | 6090129408 |
| 24 | 13103005696 |
| 25 | 28118614016 |
| 26 | 60196651008 |