n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 40 |
6 | 149 |
7 | 615 |
8 | 2659 |
9 | 11641 |
10 | 51672 |
11 | 231598 |
12 | 1044550 |
13 | 4729221 |
14 | 21473854 |
15 | 97727797 |
16 | 445587611 |
17 | 2034814173 |
18 | 9304775285 |
19 | 42600153350 |
20 | 195249156987 |
21 | 895771869115 |
22 | 4113392176083 |
23 | 18904548916567 |
24 | 86949854091897 |
[1,1,3,12,40,149,615,2659,11641,51672,231598, 1044550,4729221,21473854,97727797,445587611, 2034814173,9304775285,42600153350,195249156987, 895771869115,4113392176083,18904548916567, 86949854091897] |