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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 5 |
| 7 | 8 |
| 8 | 21 |
| 9 | 41 |
| 10 | 91 |
| 11 | 199 |
| 12 | 403 |
| 13 | 873 |
| 14 | 1767 |
| 15 | 3740 |
| 16 | 7709 |
| 17 | 15910 |
| 18 | 32759 |
| 19 | 67185 |
| 20 | 138063 |
| 21 | 281566 |
| 22 | 576165 |
| 23 | 1173435 |
| 24 | 2390366 |
| 25 | 4860357 |
| 26 | 9873071 |
| 27 | 20033969 |
| 28 | 40612221 |
| 29 | 82266433 |
| 30 | 166483857 |
| 31 | 336713632 |
| 32 | 680482316 |
| 33 | 1374413154 |
| 34 | 2774347425 |