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 | 6 |
| 4 | 12 |
| 5 | 20 |
| 6 | 40 |
| 7 | 80 |
| 8 | 160 |
| 9 | 320 |
| 10 | 578 |
| 11 | 1156 |
| 12 | 2132 |
| 13 | 4264 |
| 14 | 8528 |
| 15 | 17056 |
| 16 | 34112 |
| 17 | 64384 |
| 18 | 128768 |
| 19 | 245292 |
| 20 | 490584 |
| 21 | 981168 |
| 22 | 1962336 |
| 23 | 3924672 |
| 24 | 7556046 |
| 25 | 15112092 |
| 26 | 29246744 |
| 27 | 58493488 |
| 28 | 116986976 |
| 29 | 233973952 |
| 30 | 467947904 |
| 31 | 911000006 |
| 32 | 1822000012 |