n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 16 |
5 | 46 |
6 | 132 |
7 | 386 |
8 | 1136 |
9 | 3366 |
10 | 10012 |
11 | 29866 |
12 | 89256 |
13 | 267086 |
14 | 799892 |
15 | 2396946 |
16 | 7185376 |
17 | 21545206 |
18 | 64613772 |
19 | 193797626 |
20 | 581305496 |
21 | 1743741726 |
22 | 5230875652 |
23 | 15691927906 |
24 | 47074385616 |
25 | 141220360646 |
26 | 423655489532 |
[0,1,2,6,16,46,132,386,1136,3366,10012,29866, 89256,267086,799892,2396946,7185376,21545206, 64613772,193797626,581305496,1743741726, 5230875652,15691927906,47074385616,141220360646, 423655489532] |