n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 10 |
5 | 32 |
6 | 91 |
7 | 273 |
8 | 816 |
9 | 2420 |
10 | 7209 |
11 | 21456 |
12 | 63842 |
13 | 190008 |
14 | 565470 |
15 | 1682835 |
16 | 5008192 |
17 | 14904512 |
18 | 44356229 |
19 | 132005445 |
20 | 392851940 |
21 | 1169138532 |
22 | 3479389655 |
23 | 10354762656 |
24 | 30816068600 |
25 | 91709498068 |
26 | 272930078466 |
27 | 812247687927 |
[0,0,2,3,10,32,91,273,816,2420,7209,21456,63842, 190008,565470,1682835,5008192,14904512,44356229, 132005445,392851940,1169138532,3479389655, 10354762656,30816068600,91709498068,272930078466, 812247687927] |