n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 8 |
4 | 18 |
5 | 54 |
6 | 156 |
7 | 412 |
8 | 1168 |
9 | 3200 |
10 | 8848 |
11 | 24192 |
12 | 66632 |
13 | 181912 |
14 | 495536 |
15 | 1354880 |
16 | 3680352 |
17 | 9997056 |
18 | 27093216 |
19 | 73376512 |
20 | 198355840 |
21 | 535319168 |
22 | 1443042688 |
23 | 3884515008 |
24 | 10445579840 |
25 | 28046885824 |
26 | 75225974912 |
27 | 201536064896 |
28 | 539339293824 |
29 | 1441781213952 |
[1,1,2,8,18,54,156,412,1168,3200,8848,24192,66632, 181912,495536,1354880,3680352,9997056,27093216, 73376512,198355840,535319168,1443042688, 3884515008,10445579840,28046885824,75225974912, 201536064896,539339293824,1441781213952] |