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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 2 |
| 8 | 4 |
| 9 | 8 |
| 10 | 16 |
| 11 | 32 |
| 12 | 64 |
| 13 | 129 |
| 14 | 267 |
| 15 | 582 |
| 16 | 1364 |
| 17 | 3454 |
| 18 | 9338 |
| 19 | 26429 |
| 20 | 76929 |
| 21 | 227579 |
| 22 | 680113 |
| 23 | 2050000 |
| 24 | 6242818 |
| 25 | 19284165 |
| 26 | 60754153 |
| 27 | 196341570 |
| 28 | 654012814 |
| 29 | 2251195713 |
| 30 | 8005274899 |
| 31 | 29325473071 |
| 32 | 110181281435 |
| 33 | 422565983725 |