n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 2 |
4 | 6 |
5 | 9 |
6 | 20 |
7 | 36 |
8 | 72 |
9 | 138 |
10 | 269 |
11 | 520 |
12 | 1010 |
13 | 1958 |
14 | 3798 |
15 | 7365 |
16 | 14284 |
17 | 27704 |
18 | 53728 |
19 | 104202 |
20 | 202089 |
21 | 391939 |
22 | 760128 |
23 | 1474208 |
24 | 2859096 |
25 | 5544986 |
26 | 10754022 |
27 | 20856528 |
28 | 40449464 |
29 | 78448346 |
30 | 152143931 |
31 | 295070345 |
32 | 572264028 |
33 | 1109857872 |
34 | 2152475724 |
35 | 4174545216 |
[1,0,2,2,6,9,20,36,72,138,269,520,1010,1958,3798, 7365,14284,27704,53728,104202,202089,391939, 760128,1474208,2859096,5544986,10754022,20856528, 40449464,78448346,152143931,295070345,572264028, 1109857872,2152475724,4174545216] |