n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 14 |
4 | 41 |
5 | 143 |
6 | 472 |
7 | 1562 |
8 | 5233 |
9 | 17395 |
10 | 58002 |
11 | 193346 |
12 | 644219 |
13 | 2147421 |
14 | 7156704 |
15 | 23852324 |
16 | 79497767 |
17 | 264952955 |
18 | 883057354 |
19 | 2943113598 |
20 | 9809007073 |
21 | 32692164351 |
22 | 108958689984 |
23 | 363145140266 |
24 | 1210315480391 |
25 | 4033823637937 |
26 | 13444208923518 |
27 | 44807796457932 |
[1,1,4,14,41,143,472,1562,5233,17395,58002,193346, 644219,2147421,7156704,23852324,79497767, 264952955,883057354,2943113598,9809007073, 32692164351,108958689984,363145140266, 1210315480391,4033823637937,13444208923518, 44807796457932] |