n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 5 |
4 | 19 |
5 | 73 |
6 | 292 |
7 | 1203 |
8 | 5065 |
9 | 21697 |
10 | 94274 |
11 | 414514 |
12 | 1840981 |
13 | 8247011 |
14 | 37220261 |
15 | 169079113 |
16 | 772489020 |
17 | 3547371679 |
18 | 16364309243 |
19 | 75799327800 |
20 | 352402156770 |
21 | 1643878188646 |
22 | 7691841654538 |
23 | 36091803172733 |
[1,0,1,5,19,73,292,1203,5065,21697,94274,414514, 1840981,8247011,37220261,169079113,772489020, 3547371679,16364309243,75799327800,352402156770, 1643878188646,7691841654538,36091803172733] |