n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 42 |
3 | 306 |
4 | 2250 |
5 | 16578 |
6 | 122202 |
7 | 900882 |
8 | 6641514 |
9 | 48963042 |
10 | 360969210 |
11 | 2661166386 |
12 | 19618866954 |
13 | 144635805954 |
14 | 1066295850138 |
15 | 7861032979794 |
16 | 57953746616490 |
17 | 427251323790882 |
18 | 3149816954720058 |
19 | 23221336706989938 |
20 | 171194226906268746 |
21 | 1262092001672539458 |
[1,6,42,306,2250,16578,122202,900882,6641514, 48963042,360969210,2661166386,19618866954, 144635805954,1066295850138,7861032979794, 57953746616490,427251323790882,3149816954720058, 23221336706989938,171194226906268746, 1262092001672539458] |