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 | 4 |
| 3 | 8 |
| 4 | 18 |
| 5 | 40 |
| 6 | 88 |
| 7 | 192 |
| 8 | 420 |
| 9 | 922 |
| 10 | 2024 |
| 11 | 4440 |
| 12 | 9736 |
| 13 | 21352 |
| 14 | 46832 |
| 15 | 102720 |
| 16 | 225298 |
| 17 | 494144 |
| 18 | 1083804 |
| 19 | 2377112 |
| 20 | 5213736 |
| 21 | 11435312 |
| 22 | 25081112 |
| 23 | 55010496 |
| 24 | 120654744 |
| 25 | 264632554 |
| 26 | 580419672 |
| 27 | 1273036832 |
| 28 | 2792156864 |
| 29 | 6124049048 |
| 30 | 13431901808 |
| 31 | 29460245120 |
| 32 | 64615275940 |