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 | 3 |
| 5 | 5 |
| 6 | 12 |
| 7 | 28 |
| 8 | 66 |
| 9 | 153 |
| 10 | 367 |
| 11 | 880 |
| 12 | 2121 |
| 13 | 5127 |
| 14 | 12441 |
| 15 | 30248 |
| 16 | 73746 |
| 17 | 180077 |
| 18 | 440571 |
| 19 | 1079438 |
| 20 | 2648511 |
| 21 | 6506170 |
| 22 | 16001256 |
| 23 | 39393173 |
| 24 | 97074140 |
| 25 | 239419963 |
| 26 | 590972968 |
| 27 | 1459808862 |
| 28 | 3608483107 |
| 29 | 8925476591 |
| 30 | 22090139751 |
| 31 | 54702648393 |
| 32 | 135533335933 |
| 33 | 335967782916 |