n | a(n) |
---|---|
1 | 2 |
2 | 12 |
3 | 42 |
4 | 136 |
5 | 550 |
6 | 1892 |
7 | 7384 |
8 | 26816 |
9 | 103288 |
10 | 386928 |
11 | 1485566 |
12 | 5654000 |
13 | 21736466 |
14 | 83448592 |
15 | 321767288 |
16 | 1241835856 |
17 | 4803432344 |
18 | 18605438864 |
19 | 72168550344 |
20 | 280295950240 |
21 | 1089835505354 |
22 | 4242072071396 |
23 | 16526909026016 |
24 | 64446293812896 |
[2,12,42,136,550,1892,7384,26816,103288,386928, 1485566,5654000,21736466,83448592,321767288, 1241835856,4803432344,18605438864,72168550344, 280295950240,1089835505354,4242072071396, 16526909026016,64446293812896] |