n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 23 |
6 | 62 |
7 | 179 |
8 | 549 |
9 | 1773 |
10 | 6003 |
11 | 21233 |
12 | 78187 |
13 | 298894 |
14 | 1183387 |
15 | 4842221 |
16 | 20438964 |
17 | 88849325 |
18 | 397183838 |
19 | 1823456223 |
20 | 8587051052 |
21 | 41434641992 |
22 | 204654311282 |
23 | 1033757421996 |
24 | 5335693879201 |
25 | 28118977852767 |
26 | 151192761513229 |
27 | 828884087889407 |
[1,1,2,4,9,23,62,179,549,1773,6003,21233,78187, 298894,1183387,4842221,20438964,88849325, 397183838,1823456223,8587051052,41434641992, 204654311282,1033757421996,5335693879201, 28118977852767,151192761513229,828884087889407] |