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 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 23 |
| 6 | 49 |
| 7 | 103 |
| 8 | 214 |
| 9 | 434 |
| 10 | 874 |
| 11 | 1738 |
| 12 | 3443 |
| 13 | 6765 |
| 14 | 13193 |
| 15 | 25512 |
| 16 | 48957 |
| 17 | 93267 |
| 18 | 176595 |
| 19 | 332550 |
| 20 | 622957 |
| 21 | 1161230 |
| 22 | 2153710 |
| 23 | 3974809 |
| 24 | 7299707 |
| 25 | 13343290 |
| 26 | 24280924 |
| 27 | 43999100 |
| 28 | 79412942 |
| 29 | 142792535 |
| 30 | 255826836 |
| 31 | 456735456 |
| 32 | 812627069 |
| 33 | 1440971069 |
| 34 | 2546729830 |