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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 0 |
| 8 | 1 |
| 9 | 2 |
| 10 | 1 |
| 11 | 4 |
| 12 | 9 |
| 13 | 12 |
| 14 | 27 |
| 15 | 50 |
| 16 | 99 |
| 17 | 188 |
| 18 | 386 |
| 19 | 740 |
| 20 | 1528 |
| 21 | 3012 |
| 22 | 6192 |
| 23 | 12376 |
| 24 | 25594 |
| 25 | 51628 |
| 26 | 107135 |
| 27 | 218100 |
| 28 | 453895 |
| 29 | 930812 |
| 30 | 1943281 |
| 31 | 4009512 |
| 32 | 8394915 |
| 33 | 17414512 |