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 | 8 |
| 1 | 44 |
| 2 | 188 |
| 3 | 764 |
| 4 | 3068 |
| 5 | 12284 |
| 6 | 49148 |
| 7 | 196604 |
| 8 | 786428 |
| 9 | 3145724 |
| 10 | 12582908 |
| 11 | 50331644 |
| 12 | 201326588 |
| 13 | 805306364 |
| 14 | 3221225468 |
| 15 | 12884901884 |
| 16 | 51539607548 |
| 17 | 206158430204 |
| 18 | 824633720828 |
| 19 | 3298534883324 |
| 20 | 13194139533308 |
| 21 | 52776558133244 |
| 22 | 211106232532988 |
| 23 | 844424930131964 |