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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 19 |
| 7 | 42 |
| 8 | 89 |
| 9 | 191 |
| 10 | 402 |
| 11 | 847 |
| 12 | 1763 |
| 13 | 3667 |
| 14 | 7564 |
| 15 | 15564 |
| 16 | 31851 |
| 17 | 64987 |
| 18 | 132031 |
| 19 | 267471 |
| 20 | 539949 |
| 21 | 1087004 |
| 22 | 2181796 |
| 23 | 4367927 |
| 24 | 8721533 |
| 25 | 17372967 |
| 26 | 34524291 |
| 27 | 68456755 |
| 28 | 135446896 |
| 29 | 267444085 |
| 30 | 527027186 |
| 31 | 1036591718 |
| 32 | 2035083599 |