n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 30 |
3 | 150 |
4 | 726 |
5 | 3510 |
6 | 16710 |
7 | 79494 |
8 | 375174 |
9 | 1769686 |
10 | 8306862 |
11 | 38975286 |
12 | 182265822 |
13 | 852063558 |
14 | 3973784886 |
15 | 18527532310 |
16 | 86228667894 |
17 | 401225368086 |
18 | 1864308847838 |
19 | 8660961643254 |
20 | 40190947325670 |
21 | 186475398518726 |
22 | 864404776466406 |
23 | 4006394107568934 |
24 | 18554916271112254 |
25 | 85923704942057238 |
[1,6,30,150,726,3510,16710,79494,375174,1769686, 8306862,38975286,182265822,852063558,3973784886, 18527532310,86228667894,401225368086, 1864308847838,8660961643254,40190947325670, 186475398518726,864404776466406,4006394107568934, 18554916271112254,85923704942057238] |