n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 3 |
5 | 6 |
6 | 10 |
7 | 25 |
8 | 45 |
9 | 77 |
10 | 175 |
11 | 322 |
12 | 570 |
13 | 1245 |
14 | 2325 |
15 | 4213 |
16 | 9031 |
17 | 17061 |
18 | 31421 |
19 | 66547 |
20 | 126763 |
21 | 236203 |
22 | 496063 |
23 | 950818 |
24 | 1787346 |
25 | 3730293 |
26 | 7184421 |
27 | 13598053 |
28 | 28243063 |
29 | 54604081 |
30 | 103918153 |
31 | 215008363 |
32 | 416990563 |
33 | 797154723 |
[0,0,0,3,6,10,25,45,77,175,322,570,1245,2325,4213, 9031,17061,31421,66547,126763,236203,496063, 950818,1787346,3730293,7184421,13598053,28243063, 54604081,103918153,215008363,416990563,797154723] |