n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 32 |
6 | 108 |
7 | 312 |
8 | 1036 |
9 | 3552 |
10 | 11680 |
11 | 39214 |
12 | 136772 |
13 | 471748 |
14 | 1626866 |
15 | 5722264 |
16 | 20199400 |
17 | 71116826 |
18 | 252507746 |
19 | 902188304 |
20 | 3222655648 |
21 | 11548005134 |
22 | 41588468526 |
23 | 150008189222 |
24 | 541865647164 |
25 | 1963642984244 |
26 | 7131101379546 |
27 | 25927597277242 |
28 | 94455538469920 |
29 | 344779963787714 |
30 | 1260046402628588 |
[1,0,2,4,10,32,108,312,1036,3552,11680,39214, 136772,471748,1626866,5722264,20199400,71116826, 252507746,902188304,3222655648,11548005134, 41588468526,150008189222,541865647164, 1963642984244,7131101379546,25927597277242, 94455538469920,344779963787714,1260046402628588] |