n | a(n) |
---|---|
1 | 3 |
2 | 8 |
3 | 21 |
4 | 54 |
5 | 185 |
6 | 561 |
7 | 1943 |
8 | 6756 |
9 | 24003 |
10 | 88488 |
11 | 325775 |
12 | 1225789 |
13 | 4623559 |
14 | 17568716 |
15 | 67018935 |
16 | 256235910 |
17 | 982016953 |
18 | 3767662049 |
19 | 14470021611 |
20 | 55610192696 |
21 | 213805376253 |
22 | 822314635406 |
23 | 3163303832419 |
24 | 12170737198879 |
25 | 46831328979593 |
[3,8,21,54,185,561,1943,6756,24003,88488,325775, 1225789,4623559,17568716,67018935,256235910, 982016953,3767662049,14470021611,55610192696, 213805376253,822314635406,3163303832419, 12170737198879,46831328979593] |