n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 8 |
6 | 25 |
7 | 53 |
8 | 164 |
9 | 348 |
10 | 1077 |
11 | 2285 |
12 | 7072 |
13 | 15004 |
14 | 46437 |
15 | 98521 |
16 | 304920 |
17 | 646920 |
18 | 2002201 |
19 | 4247881 |
20 | 13147084 |
21 | 27892928 |
22 | 86327905 |
23 | 183153773 |
24 | 566856284 |
25 | 1202645508 |
26 | 3722157357 |
27 | 7896950165 |
28 | 24440860552 |
29 | 51853868404 |
30 | 160486408077 |
[0,0,1,1,4,8,25,53,164,348,1077,2285,7072,15004, 46437,98521,304920,646920,2002201,4247881, 13147084,27892928,86327905,183153773,566856284, 1202645508,3722157357,7896950165,24440860552, 51853868404,160486408077] |