n | a(n) |
---|---|
1 | 3 |
2 | 9 |
3 | 24 |
4 | 66 |
5 | 174 |
6 | 462 |
7 | 1206 |
8 | 3150 |
9 | 8166 |
10 | 21150 |
11 | 54582 |
12 | 140718 |
13 | 362118 |
14 | 931134 |
15 | 2391894 |
16 | 6141006 |
17 | 15757734 |
18 | 40420062 |
19 | 103647606 |
20 | 265721070 |
21 | 681097926 |
22 | 1745555070 |
23 | 4473092502 |
24 | 11461604238 |
25 | 29366557158 |
26 | 75238139934 |
27 | 192754700214 |
[3,9,24,66,174,462,1206,3150,8166,21150,54582, 140718,362118,931134,2391894,6141006,15757734, 40420062,103647606,265721070,681097926,1745555070, 4473092502,11461604238,29366557158,75238139934, 192754700214] |