n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 13 |
5 | 39 |
6 | 113 |
7 | 359 |
8 | 1161 |
9 | 3708 |
10 | 11961 |
11 | 38903 |
12 | 126885 |
13 | 415509 |
14 | 1365935 |
15 | 4501009 |
16 | 14856863 |
17 | 49115474 |
18 | 162590020 |
19 | 538828790 |
20 | 1787431873 |
21 | 5934532485 |
22 | 19718347615 |
23 | 65559507987 |
24 | 218095336290 |
25 | 725890070743 |
26 | 2417022095921 |
[1,2,4,13,39,113,359,1161,3708,11961,38903,126885, 415509,1365935,4501009,14856863,49115474, 162590020,538828790,1787431873,5934532485, 19718347615,65559507987,218095336290,725890070743, 2417022095921] |