n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 2 |
4 | 20 |
5 | 138 |
6 | 505 |
7 | 1547 |
8 | 3759 |
9 | 8313 |
10 | 16350 |
11 | 30344 |
12 | 52470 |
13 | 87212 |
14 | 138255 |
15 | 212953 |
16 | 317065 |
17 | 461827 |
18 | 655724 |
19 | 915038 |
20 | 1251720 |
21 | 1688414 |
22 | 2241365 |
23 | 2941047 |
24 | 3808915 |
25 | 4884893 |
26 | 6196650 |
27 | 7795332 |
28 | 9715914 |
29 | 12022688 |
30 | 14759115 |
31 | 18004709 |
32 | 21812685 |
33 | 26280007 |
34 | 31471000 |
35 | 37502458 |
[0,0,2,20,138,505,1547,3759,8313,16350,30344, 52470,87212,138255,212953,317065,461827,655724, 915038,1251720,1688414,2241365,2941047,3808915, 4884893,6196650,7795332,9715914,12022688,14759115, 18004709,21812685,26280007,31471000,37502458] |