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 | 2 |
| 3 | 7 |
| 4 | 16 |
| 5 | 44 |
| 6 | 102 |
| 7 | 244 |
| 8 | 554 |
| 9 | 1247 |
| 10 | 2772 |
| 11 | 6111 |
| 12 | 13334 |
| 13 | 28916 |
| 14 | 62302 |
| 15 | 133557 |
| 16 | 285020 |
| 17 | 605869 |
| 18 | 1283362 |
| 19 | 2710008 |
| 20 | 5706546 |
| 21 | 11986171 |
| 22 | 25118500 |
| 23 | 52529339 |
| 24 | 109643310 |
| 25 | 228455907 |
| 26 | 475250388 |
| 27 | 987177924 |
| 28 | 2047710144 |
| 29 | 4242128909 |
| 30 | 8777675002 |
| 31 | 18142184432 |
| 32 | 37458037658 |