n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 10 |
4 | 30 |
5 | 94 |
6 | 316 |
7 | 1112 |
8 | 3976 |
9 | 14798 |
10 | 56508 |
11 | 217444 |
12 | 856594 |
13 | 3430942 |
14 | 13813620 |
15 | 56463442 |
16 | 233440548 |
17 | 968955348 |
18 | 4064389254 |
19 | 17189382700 |
20 | 72928723582 |
21 | 311804852012 |
22 | 1341392988174 |
23 | 5785742781494 |
24 | 25102210579594 |
25 | 109434792302328 |
26 | 478132786545494 |
27 | 2098665310659574 |
28 | 9247115836091400 |
[1,2,4,10,30,94,316,1112,3976,14798,56508,217444, 856594,3430942,13813620,56463442,233440548, 968955348,4064389254,17189382700,72928723582, 311804852012,1341392988174,5785742781494, 25102210579594,109434792302328,478132786545494, 2098665310659574,9247115836091400] |