n | a(n) |
---|---|
1 | 3 |
2 | 11 |
3 | 35 |
4 | 98 |
5 | 260 |
6 | 643 |
7 | 1563 |
8 | 3631 |
9 | 8407 |
10 | 18833 |
11 | 42313 |
12 | 92621 |
13 | 203973 |
14 | 439525 |
15 | 954373 |
16 | 2033480 |
17 | 4369630 |
18 | 9232317 |
19 | 19680561 |
20 | 41311764 |
21 | 87507822 |
22 | 182738699 |
23 | 385095795 |
24 | 800788788 |
25 | 1680371358 |
26 | 3482028637 |
27 | 7280492521 |
28 | 15041978366 |
[3,11,35,98,260,643,1563,3631,8407,18833,42313, 92621,203973,439525,954373,2033480,4369630, 9232317,19680561,41311764,87507822,182738699, 385095795,800788788,1680371358,3482028637, 7280492521,15041978366] |