The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 3 |
| 4 | 1 |
| 5 | 1 |
| 6 | 10 |
| 7 | 5 |
| 8 | 7 |
| 9 | 35 |
| 10 | 22 |
| 11 | 37 |
| 12 | 126 |
| 13 | 95 |
| 14 | 174 |
| 15 | 463 |
| 16 | 408 |
| 17 | 770 |
| 18 | 1732 |
| 19 | 1742 |
| 20 | 3290 |
| 21 | 6584 |
| 22 | 7385 |
| 23 | 13760 |
| 24 | 25384 |
| 25 | 31078 |
| 26 | 56786 |
| 27 | 99043 |
| 28 | 129886 |
| 29 | 232393 |
| 30 | 390242 |
| 31 | 539558 |
| 32 | 946121 |
| 33 | 1549554 |
| 34 | 2229896 |
| 35 | 3839826 |
| 36 | 6189683 |
| 37 | 9176831 |
| 38 | 15556174 |
| 39 | 24835641 |
| 40 | 37636912 |
| 41 | 62964623 |
[1,0,0,3,1,1,10,5,7,35,22,37,126,95,174,463,408, 770,1732,1742,3290,6584,7385,13760,25384,31078, 56786,99043,129886,232393,390242,539558,946121, 1549554,2229896,3839826,6189683,9176831,15556174, 24835641,37636912,62964623] |