n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 13 |
4 | 26 |
5 | 100 |
6 | 196 |
7 | 820 |
8 | 1581 |
9 | 6954 |
10 | 13244 |
11 | 60214 |
12 | 113620 |
13 | 528840 |
14 | 990756 |
15 | 4692780 |
16 | 8741876 |
17 | 41970280 |
18 | 77824912 |
19 | 377687453 |
20 | 697689538 |
21 | 3415756084 |
22 | 6289798684 |
23 | 31018849628 |
24 | 56964451670 |
25 | 282658474700 |
26 | 517885177320 |
[1,2,4,13,26,100,196,820,1581,6954,13244,60214, 113620,528840,990756,4692780,8741876,41970280, 77824912,377687453,697689538,3415756084, 6289798684,31018849628,56964451670,282658474700, 517885177320] |