n | a(n) |
---|---|
1 | 2 |
2 | 18 |
3 | 56 |
4 | 238 |
5 | 902 |
6 | 3564 |
7 | 13862 |
8 | 54238 |
9 | 211736 |
10 | 827298 |
11 | 3231362 |
12 | 12623044 |
13 | 49308482 |
14 | 192613698 |
15 | 752401496 |
16 | 2939092798 |
17 | 11480914982 |
18 | 44847668844 |
19 | 175187526662 |
20 | 684331472398 |
21 | 2673190054136 |
22 | 10442227799538 |
23 | 40790261396162 |
24 | 159338166024964 |
25 | 622419427368002 |
[2,18,56,238,902,3564,13862,54238,211736,827298, 3231362,12623044,49308482,192613698,752401496, 2939092798,11480914982,44847668844,175187526662, 684331472398,2673190054136,10442227799538, 40790261396162,159338166024964,622419427368002] |