n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 6 |
4 | 13 |
5 | 47 |
6 | 128 |
7 | 405 |
8 | 1181 |
9 | 3598 |
10 | 10705 |
11 | 32259 |
12 | 96544 |
13 | 290009 |
14 | 869417 |
15 | 2609238 |
16 | 7826117 |
17 | 23480935 |
18 | 70438624 |
19 | 211322637 |
20 | 633956965 |
21 | 1901888606 |
22 | 5705637161 |
23 | 17116957851 |
24 | 51350798528 |
25 | 154052516977 |
26 | 462157354513 |
27 | 1386472381350 |
[1,1,6,13,47,128,405,1181,3598,10705,32259,96544, 290009,869417,2609238,7826117,23480935,70438624, 211322637,633956965,1901888606,5705637161, 17116957851,51350798528,154052516977,462157354513, 1386472381350] |