n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 2 |
4 | 2 |
5 | 2 |
6 | 15 |
7 | 32 |
8 | 53 |
9 | 192 |
10 | 527 |
11 | 1152 |
12 | 3327 |
13 | 9578 |
14 | 24217 |
15 | 66528 |
16 | 190357 |
17 | 515692 |
18 | 1421172 |
19 | 4036034 |
20 | 11272501 |
21 | 31489762 |
22 | 89370575 |
23 | 253106188 |
24 | 715642419 |
25 | 2038291672 |
26 | 5816775442 |
27 | 16592350656 |
28 | 47490009821 |
29 | 136246784272 |
30 | 391111252072 |
31 | 1124779108330 |
[1,0,0,2,2,2,15,32,53,192,527,1152,3327,9578, 24217,66528,190357,515692,1421172,4036034, 11272501,31489762,89370575,253106188,715642419, 2038291672,5816775442,16592350656,47490009821, 136246784272,391111252072,1124779108330] |