n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 18 |
4 | 58 |
5 | 190 |
6 | 638 |
7 | 2170 |
8 | 7474 |
9 | 25974 |
10 | 90982 |
11 | 320738 |
12 | 1137002 |
13 | 4049838 |
14 | 14485326 |
15 | 52001290 |
16 | 187292514 |
17 | 676546790 |
18 | 2450311862 |
19 | 8895769714 |
20 | 32366225562 |
21 | 117995832990 |
22 | 430960312862 |
23 | 1576675041434 |
24 | 5777325893266 |
25 | 21200338220630 |
26 | 77901645076998 |
27 | 286615385651970 |
28 | 1055762834791114 |
29 | 3893279267979662 |
[1,2,6,18,58,190,638,2170,7474,25974,90982,320738, 1137002,4049838,14485326,52001290,187292514, 676546790,2450311862,8895769714,32366225562, 117995832990,430960312862,1576675041434, 5777325893266,21200338220630,77901645076998, 286615385651970,1055762834791114,3893279267979662] |