n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 11 |
3 | 41 |
4 | 320 |
5 | 1917 |
6 | 14582 |
7 | 100562 |
8 | 688427 |
9 | 4380888 |
10 | 26324611 |
11 | 148136566 |
12 | 785175771 |
13 | 3925637781 |
14 | 18586683128 |
15 | 83578440418 |
16 | 358079558873 |
17 | 1465784048253 |
18 | 5748270468573 |
19 | 21649265291143 |
20 | 78483868584001 |
[1,1,11,41,320,1917,14582,100562,688427,4380888, 26324611,148136566,785175771,3925637781, 18586683128,83578440418,358079558873, 1465784048253,5748270468573,21649265291143, 78483868584001] |