n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 13 |
3 | 80 |
4 | 538 |
5 | 3740 |
6 | 26650 |
7 | 193160 |
8 | 1417945 |
9 | 10511450 |
10 | 78533629 |
11 | 590485208 |
12 | 4463274232 |
13 | 33886781840 |
14 | 258260802232 |
15 | 1974759985952 |
16 | 15143163422794 |
17 | 116417053435316 |
18 | 896996316176290 |
19 | 6925241271855296 |
20 | 53562550587963052 |
21 | 414948608904171464 |
22 | 3219356873886333676 |
[1,2,13,80,538,3740,26650,193160,1417945,10511450, 78533629,590485208,4463274232,33886781840, 258260802232,1974759985952,15143163422794, 116417053435316,896996316176290,6925241271855296, 53562550587963052,414948608904171464, 3219356873886333676] |