n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 42 |
3 | 238 |
4 | 1260 |
5 | 6174 |
6 | 28784 |
7 | 128046 |
8 | 548832 |
9 | 2275372 |
10 | 9166311 |
11 | 35987028 |
12 | 138069505 |
13 | 518758758 |
14 | 1912300908 |
15 | 6926911674 |
16 | 24688892511 |
17 | 86685575466 |
18 | 300137463682 |
19 | 1025683381758 |
20 | 3462381505989 |
21 | 11553577667100 |
22 | 38134513479591 |
23 | 124575624677088 |
24 | 402986660479024 |
[1,6,42,238,1260,6174,28784,128046,548832,2275372, 9166311,35987028,138069505,518758758,1912300908, 6926911674,24688892511,86685575466,300137463682, 1025683381758,3462381505989,11553577667100, 38134513479591,124575624677088,402986660479024] |