n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 34 |
4 | 210 |
5 | 1378 |
6 | 9726 |
7 | 73314 |
8 | 588846 |
9 | 5018290 |
10 | 45216798 |
11 | 429290178 |
12 | 4281260386 |
13 | 44724792130 |
14 | 488185773782 |
15 | 5555082575762 |
16 | 65760600166734 |
17 | 808339570702354 |
18 | 10299822335353654 |
19 | 135828836289073570 |
20 | 1851208197237464530 |
21 | 26040184250745321058 |
[0,1,6,34,210,1378,9726,73314,588846,5018290, 45216798,429290178,4281260386,44724792130, 488185773782,5555082575762,65760600166734, 808339570702354,10299822335353654, 135828836289073570,1851208197237464530, 26040184250745321058] |