n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 7 |
4 | 27 |
5 | 101 |
6 | 337 |
7 | 1151 |
8 | 3843 |
9 | 12965 |
10 | 43773 |
11 | 148529 |
12 | 505605 |
13 | 1727771 |
14 | 5920823 |
15 | 20345445 |
16 | 70073901 |
17 | 241849929 |
18 | 836230109 |
19 | 2896104951 |
20 | 10044664507 |
21 | 34884102385 |
22 | 121293088909 |
23 | 422196245641 |
24 | 1471030361069 |
25 | 5130057477187 |
26 | 17905427995239 |
[0,1,7,27,101,337,1151,3843,12965,43773,148529, 505605,1727771,5920823,20345445,70073901, 241849929,836230109,2896104951,10044664507, 34884102385,121293088909,422196245641, 1471030361069,5130057477187,17905427995239] |