n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 18 |
3 | 57 |
4 | 180 |
5 | 617 |
6 | 2400 |
7 | 10717 |
8 | 54544 |
9 | 312353 |
10 | 1988104 |
11 | 13921501 |
12 | 106350816 |
13 | 880162337 |
14 | 7844596536 |
15 | 74910367309 |
16 | 763030711936 |
17 | 8257927397569 |
18 | 94628877364936 |
19 | 1144609672707741 |
20 | 14573622985067744 |
21 | 194834987492011649 |
22 | 2728787718495477144 |
23 | 39955604972310966797 |
[1,5,18,57,180,617,2400,10717,54544,312353, 1988104,13921501,106350816,880162337,7844596536, 74910367309,763030711936,8257927397569, 94628877364936,1144609672707741,14573622985067744, 194834987492011649,2728787718495477144, 39955604972310966797] |