n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 7 |
6 | 12 |
7 | 30 |
8 | 55 |
9 | 143 |
10 | 273 |
11 | 728 |
12 | 1428 |
13 | 3876 |
14 | 7752 |
15 | 21318 |
16 | 43263 |
17 | 120175 |
18 | 246675 |
19 | 690690 |
20 | 1430715 |
21 | 4032015 |
22 | 8414640 |
23 | 23841480 |
24 | 50067108 |
25 | 142498692 |
26 | 300830572 |
27 | 859515920 |
28 | 1822766520 |
29 | 5225264024 |
30 | 11124755664 |
31 | 31983672534 |
[1,1,1,2,3,7,12,30,55,143,273,728,1428,3876,7752, 21318,43263,120175,246675,690690,1430715,4032015, 8414640,23841480,50067108,142498692,300830572, 859515920,1822766520,5225264024,11124755664, 31983672534] |