n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 3 |
5 | 11 |
6 | 65 |
7 | 287 |
8 | 1373 |
9 | 6370 |
10 | 30149 |
11 | 142638 |
12 | 681520 |
13 | 3270604 |
14 | 15789461 |
15 | 76562081 |
16 | 372832744 |
17 | 1822142769 |
18 | 8934740804 |
19 | 43938715224 |
20 | 216650217219 |
21 | 1070791145115 |
22 | 5303851997213 |
23 | 26323053574543 |
24 | 130878372709130 |
25 | 651812928565763 |
26 | 3251215398061949 |
27 | 16240020484212325 |
28 | 81227147300622466 |
29 | 406770969577924068 |
30 | 2039375196443918387 |
[0,0,0,3,11,65,287,1373,6370,30149,142638,681520, 3270604,15789461,76562081,372832744,1822142769, 8934740804,43938715224,216650217219,1070791145115, 5303851997213,26323053574543,130878372709130, 651812928565763,3251215398061949, 16240020484212325,81227147300622466, 406770969577924068,2039375196443918387] |