n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 7 |
3 | 31 |
4 | 115 |
5 | 391 |
6 | 1267 |
7 | 3991 |
8 | 12355 |
9 | 37831 |
10 | 115027 |
11 | 348151 |
12 | 1050595 |
13 | 3164071 |
14 | 9516787 |
15 | 28599511 |
16 | 85896835 |
17 | 257887111 |
18 | 774054547 |
19 | 2322950071 |
20 | 6970423075 |
21 | 20914414951 |
22 | 62749536307 |
23 | 188261191831 |
24 | 564808741315 |
25 | 1694476555591 |
[0,1,7,31,115,391,1267,3991,12355,37831,115027, 348151,1050595,3164071,9516787,28599511,85896835, 257887111,774054547,2322950071,6970423075, 20914414951,62749536307,188261191831,564808741315, 1694476555591] |