n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 6 |
4 | 31 |
5 | 160 |
6 | 856 |
7 | 4802 |
8 | 28337 |
9 | 175896 |
10 | 1146931 |
11 | 7841108 |
12 | 56089804 |
13 | 418952508 |
14 | 3261082917 |
15 | 26403700954 |
16 | 221981169447 |
17 | 1934688328192 |
18 | 17454004213180 |
19 | 162765041827846 |
20 | 1566915224106221 |
21 | 15553364227949564 |
22 | 159004783733999787 |
23 | 1672432865100333916 |
[0,0,1,6,31,160,856,4802,28337,175896,1146931, 7841108,56089804,418952508,3261082917,26403700954, 221981169447,1934688328192,17454004213180, 162765041827846,1566915224106221, 15553364227949564,159004783733999787, 1672432865100333916] |