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 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 1 |
| 9 | 3 |
| 10 | 6 |
| 11 | 15 |
| 12 | 29 |
| 13 | 67 |
| 14 | 139 |
| 15 | 310 |
| 16 | 667 |
| 17 | 1480 |
| 18 | 3244 |
| 19 | 7241 |
| 20 | 16104 |
| 21 | 36192 |
| 22 | 81435 |
| 23 | 184452 |
| 24 | 418870 |
| 25 | 955860 |
| 26 | 2187664 |
| 27 | 5025990 |
| 28 | 11580130 |
| 29 | 26765230 |
| 30 | 62027433 |
| 31 | 144133676 |
| 32 | 335731381 |
| 33 | 783859852 |
| 34 | 1834104934 |
| 35 | 4300433063 |
| 36 | 10102854473 |
| 37 | 23778351222 |