n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 6 |
5 | 28 |
6 | 114 |
7 | 432 |
8 | 1566 |
9 | 5517 |
10 | 19068 |
11 | 65044 |
12 | 219852 |
13 | 738316 |
14 | 2468028 |
15 | 8222805 |
16 | 27330858 |
17 | 90685224 |
18 | 300521622 |
19 | 994991716 |
20 | 3292117698 |
21 | 10887332473 |
22 | 35992718136 |
23 | 118958691528 |
24 | 393093822744 |
25 | 1298783453112 |
26 | 4290755845176 |
27 | 14174217683209 |
28 | 46821054068430 |
29 | 154655837126740 |
[0,0,0,1,6,28,114,432,1566,5517,19068,65044, 219852,738316,2468028,8222805,27330858,90685224, 300521622,994991716,3292117698,10887332473, 35992718136,118958691528,393093822744, 1298783453112,4290755845176,14174217683209, 46821054068430,154655837126740] |