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 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 5 |
| 8 | 19 |
| 9 | 56 |
| 10 | 151 |
| 11 | 374 |
| 12 | 889 |
| 13 | 2032 |
| 14 | 4529 |
| 15 | 9858 |
| 16 | 21075 |
| 17 | 44320 |
| 18 | 91928 |
| 19 | 188288 |
| 20 | 381392 |
| 21 | 764683 |
| 22 | 1519026 |
| 23 | 2991601 |
| 24 | 5844950 |
| 25 | 11334761 |
| 26 | 21827329 |
| 27 | 41755112 |
| 28 | 79376196 |
| 29 | 149991258 |
| 30 | 281805933 |
| 31 | 526546799 |
| 32 | 978614867 |
| 33 | 1809450608 |