n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 14 |
5 | 50 |
6 | 199 |
7 | 749 |
8 | 2892 |
9 | 11028 |
10 | 42301 |
11 | 161799 |
12 | 619706 |
13 | 2372006 |
14 | 9081955 |
15 | 34767953 |
16 | 133109592 |
17 | 509594856 |
18 | 1950956857 |
19 | 7469077707 |
20 | 28594853414 |
21 | 109473250778 |
22 | 419110475455 |
23 | 1604533706357 |
24 | 6142840740900 |
25 | 23517417426300 |
[0,0,1,3,14,50,199,749,2892,11028,42301,161799, 619706,2372006,9081955,34767953,133109592, 509594856,1950956857,7469077707,28594853414, 109473250778,419110475455,1604533706357, 6142840740900,23517417426300] |