n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 30 |
4 | 335 |
5 | 4984 |
6 | 92652 |
7 | 2065146 |
8 | 53636520 |
9 | 1589752230 |
10 | 52926799310 |
11 | 1954793723688 |
12 | 79297921097850 |
13 | 3504206787532290 |
14 | 167533486104374420 |
15 | 8615231103973721610 |
16 | 474145710046504872894 |
17 | 27806642356199323970739 |
[1,1,4,30,335,4984,92652,2065146,53636520, 1589752230,52926799310,1954793723688, 79297921097850,3504206787532290, 167533486104374420,8615231103973721610, 474145710046504872894,27806642356199323970739] |