n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 36 |
5 | 246 |
6 | 2104 |
7 | 21652 |
8 | 260720 |
9 | 3598120 |
10 | 56010096 |
11 | 971055240 |
12 | 18558391936 |
13 | 387665694976 |
14 | 8787898861568 |
15 | 214868401724416 |
16 | 5636819806209792 |
17 | 157935254554567296 |
18 | 4707152127520549120 |
19 | 148704074888134683520 |
20 | 4963548160096887021056 |
21 | 174553183413968718996736 |
[1,1,2,7,36,246,2104,21652,260720,3598120, 56010096,971055240,18558391936,387665694976, 8787898861568,214868401724416,5636819806209792, 157935254554567296,4707152127520549120, 148704074888134683520,4963548160096887021056, 174553183413968718996736] |