n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 2 |
6 | 6 |
7 | 9 |
8 | 23 |
9 | 37 |
10 | 87 |
11 | 138 |
12 | 313 |
13 | 510 |
14 | 1130 |
15 | 1859 |
16 | 4070 |
17 | 6786 |
18 | 14750 |
19 | 24811 |
20 | 53715 |
21 | 91096 |
22 | 196769 |
23 | 335815 |
24 | 724470 |
25 | 1243175 |
26 | 2680212 |
27 | 4619999 |
28 | 9957652 |
29 | 17231447 |
30 | 37137177 |
31 | 64480255 |
32 | 138978282 |
33 | 242011375 |
34 | 521706359 |
35 | 910817416 |
36 | 1963885190 |
37 | 3436463468 |
38 | 7411495499 |
39 | 12995261895 |
40 | 28034824487 |
[0,0,0,1,2,6,9,23,37,87,138,313,510,1130,1859, 4070,6786,14750,24811,53715,91096,196769,335815, 724470,1243175,2680212,4619999,9957652,17231447, 37137177,64480255,138978282,242011375,521706359, 910817416,1963885190,3436463468,7411495499, 12995261895,28034824487] |