n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 27 |
3 | 140 |
4 | 651 |
5 | 2772 |
6 | 11354 |
7 | 44640 |
8 | 169371 |
9 | 624742 |
10 | 2248575 |
11 | 7922124 |
12 | 27397937 |
13 | 93214632 |
14 | 312559200 |
15 | 1034507696 |
16 | 3384194616 |
17 | 10954244952 |
18 | 35118346760 |
19 | 111602517096 |
20 | 351819819414 |
21 | 1100912299156 |
22 | 3421515852834 |
23 | 10566654790176 |
24 | 32441857824859 |
25 | 99060134392422 |
[1,6,27,140,651,2772,11354,44640,169371,624742, 2248575,7922124,27397937,93214632,312559200, 1034507696,3384194616,10954244952,35118346760, 111602517096,351819819414,1100912299156, 3421515852834,10566654790176,32441857824859, 99060134392422] |