n | a(n) |
---|---|
1 | 2 |
2 | 6 |
3 | 13 |
4 | 34 |
5 | 81 |
6 | 199 |
7 | 487 |
8 | 1190 |
9 | 2910 |
10 | 7115 |
11 | 17398 |
12 | 42539 |
13 | 104013 |
14 | 254325 |
15 | 621854 |
16 | 1520506 |
17 | 3717817 |
18 | 9090502 |
19 | 22227349 |
20 | 54348491 |
21 | 132888475 |
22 | 324928002 |
23 | 794487306 |
24 | 1942615215 |
25 | 4749923434 |
26 | 11614123295 |
27 | 28397901945 |
28 | 69436221265 |
29 | 169779754602 |
[2,6,13,34,81,199,487,1190,2910,7115,17398,42539, 104013,254325,621854,1520506,3717817,9090502, 22227349,54348491,132888475,324928002,794487306, 1942615215,4749923434,11614123295,28397901945, 69436221265,169779754602] |