n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 18 |
4 | 51 |
5 | 157 |
6 | 477 |
7 | 1445 |
8 | 4384 |
9 | 13297 |
10 | 40332 |
11 | 122339 |
12 | 371085 |
13 | 1125588 |
14 | 3414184 |
15 | 10356065 |
16 | 31412486 |
17 | 95281776 |
18 | 289013030 |
19 | 876647491 |
20 | 2659087097 |
21 | 8065664119 |
22 | 24465139829 |
23 | 74208776604 |
24 | 225093441705 |
25 | 682763681270 |
26 | 2070989900565 |
[1,6,18,51,157,477,1445,4384,13297,40332,122339, 371085,1125588,3414184,10356065,31412486,95281776, 289013030,876647491,2659087097,8065664119, 24465139829,74208776604,225093441705,682763681270, 2070989900565] |