n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 7 |
4 | 25 |
5 | 61 |
6 | 187 |
7 | 666 |
8 | 2137 |
9 | 6676 |
10 | 22001 |
11 | 73217 |
12 | 239923 |
13 | 789517 |
14 | 2624182 |
15 | 8729527 |
16 | 29026553 |
17 | 96790606 |
18 | 323546416 |
19 | 1082566763 |
20 | 3626148425 |
21 | 12163438539 |
22 | 40847087821 |
23 | 137294721676 |
24 | 461890741843 |
25 | 1555264438186 |
26 | 5240857508017 |
27 | 17672768973979 |
28 | 59634361740734 |
[1,1,1,7,25,61,187,666,2137,6676,22001,73217, 239923,789517,2624182,8729527,29026553,96790606, 323546416,1082566763,3626148425,12163438539, 40847087821,137294721676,461890741843, 1555264438186,5240857508017,17672768973979, 59634361740734] |