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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 2 |
| 9 | 4 |
| 10 | 9 |
| 11 | 21 |
| 12 | 44 |
| 13 | 96 |
| 14 | 206 |
| 15 | 450 |
| 16 | 981 |
| 17 | 2159 |
| 18 | 4757 |
| 19 | 10571 |
| 20 | 23563 |
| 21 | 52835 |
| 22 | 118939 |
| 23 | 269047 |
| 24 | 610878 |
| 25 | 1392677 |
| 26 | 3186001 |
| 27 | 7313882 |
| 28 | 16842202 |
| 29 | 38900699 |
| 30 | 90098260 |
| 31 | 209229601 |
| 32 | 487077685 |
| 33 | 1136549747 |
| 34 | 2657859059 |
| 35 | 6228447488 |
| 36 | 14624515804 |
| 37 | 34402798404 |