n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 11 |
3 | 39 |
4 | 166 |
5 | 765 |
6 | 3716 |
7 | 18725 |
8 | 96956 |
9 | 512690 |
10 | 2756806 |
11 | 15027651 |
12 | 82853678 |
13 | 461215414 |
14 | 2588619402 |
15 | 14632777719 |
16 | 83232244238 |
17 | 476040155118 |
18 | 2736005962314 |
19 | 15793863291792 |
20 | 91530881427964 |
21 | 532343678619778 |
22 | 3106141476531628 |
23 | 18177446846299299 |
[1,4,11,39,166,765,3716,18725,96956,512690, 2756806,15027651,82853678,461215414,2588619402, 14632777719,83232244238,476040155118, 2736005962314,15793863291792,91530881427964, 532343678619778,3106141476531628, 18177446846299299] |