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 | 1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 3 |
| 6 | 5 |
| 7 | 0 |
| 8 | 0 |
| 9 | 23 |
| 10 | 39 |
| 11 | 0 |
| 12 | 0 |
| 13 | 219 |
| 14 | 396 |
| 15 | 0 |
| 16 | 0 |
| 17 | 2406 |
| 18 | 4435 |
| 19 | 0 |
| 20 | 0 |
| 21 | 28431 |
| 22 | 53167 |
| 23 | 0 |
| 24 | 0 |
| 25 | 353500 |
| 26 | 667874 |
| 27 | 0 |
| 28 | 0 |
| 29 | 4557831 |
| 30 | 8675836 |
| 31 | 0 |
| 32 | 0 |
| 33 | 60382450 |
| 34 | 115601178 |
| 35 | 0 |
| 36 | 0 |
| 37 | 816998489 |
| 38 | 1571272955 |
| 39 | 0 |
| 40 | 0 |
| 41 | 11242173783 |
| 42 | 21701318843 |
| 43 | 0 |
| 44 | 0 |
| 45 | 156841667096 |