n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 20 |
3 | 315 |
4 | 2344 |
5 | 11165 |
6 | 39996 |
7 | 117655 |
8 | 299600 |
9 | 683289 |
10 | 1428580 |
11 | 2783891 |
12 | 5118840 |
13 | 8964085 |
14 | 15059084 |
15 | 24408495 |
16 | 38347936 |
17 | 58619825 |
18 | 87460020 |
19 | 127695979 |
20 | 182857160 |
21 | 257298381 |
22 | 356336860 |
23 | 486403655 |
24 | 655210224 |
25 | 871930825 |
26 | 1147401476 |
27 | 1494336195 |
28 | 1927561240 |
[0,1,20,315,2344,11165,39996,117655,299600,683289, 1428580,2783891,5118840,8964085,15059084,24408495, 38347936,58619825,87460020,127695979,182857160, 257298381,356336860,486403655,655210224,871930825, 1147401476,1494336195,1927561240] |