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 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 10 |
| 4 | 22 |
| 5 | 34 |
| 6 | 78 |
| 7 | 130 |
| 8 | 278 |
| 9 | 522 |
| 10 | 1062 |
| 11 | 2050 |
| 12 | 4190 |
| 13 | 8194 |
| 14 | 16518 |
| 15 | 32810 |
| 16 | 65814 |
| 17 | 131074 |
| 18 | 262734 |
| 19 | 524290 |
| 20 | 1049654 |
| 21 | 2097290 |
| 22 | 4196358 |
| 23 | 8388610 |
| 24 | 16781662 |
| 25 | 33554466 |
| 26 | 67117062 |
| 27 | 134218250 |
| 28 | 268451990 |
| 29 | 536870914 |
| 30 | 1073775726 |
| 31 | 2147483650 |
| 32 | 4295033110 |
| 33 | 8589936650 |