n | a(n) |
---|---|
2 | 1 |
3 | 2 |
4 | 3 |
5 | 6 |
6 | 12 |
7 | 26 |
8 | 59 |
9 | 146 |
10 | 368 |
11 | 976 |
12 | 2667 |
13 | 7482 |
14 | 21440 |
15 | 62622 |
16 | 185637 |
17 | 557680 |
18 | 1694256 |
19 | 5198142 |
20 | 16086486 |
21 | 50165218 |
22 | 157510504 |
23 | 497607008 |
24 | 1580800091 |
25 | 5047337994 |
26 | 16190223624 |
27 | 52153429218 |
28 | 168657986843 |
29 | 547389492416 |
[1,2,3,6,12,26,59,146,368,976,2667,7482,21440, 62622,185637,557680,1694256,5198142,16086486, 50165218,157510504,497607008,1580800091, 5047337994,16190223624,52153429218,168657986843, 547389492416] |