n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 7 |
6 | 20 |
7 | 59 |
8 | 184 |
9 | 593 |
10 | 1964 |
11 | 6642 |
12 | 22845 |
13 | 79667 |
14 | 281037 |
15 | 1001092 |
16 | 3595865 |
17 | 13009673 |
18 | 47366251 |
19 | 173415176 |
20 | 638044203 |
21 | 2357941142 |
22 | 8748646386 |
23 | 32576869203 |
24 | 121701491701 |
25 | 456012458965 |
26 | 1713339737086 |
[1,0,1,1,3,7,20,59,184,593,1964,6642,22845,79667, 281037,1001092,3595865,13009673,47366251, 173415176,638044203,2357941142,8748646386, 32576869203,121701491701,456012458965, 1713339737086] |