n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 7 |
3 | 20 |
4 | 55 |
5 | 148 |
6 | 403 |
7 | 1097 |
8 | 2981 |
9 | 8103 |
10 | 22026 |
11 | 59874 |
12 | 162755 |
13 | 442413 |
14 | 1202604 |
15 | 3269017 |
16 | 8886111 |
17 | 24154953 |
18 | 65659969 |
19 | 178482301 |
20 | 485165195 |
21 | 1318815734 |
22 | 3584912846 |
23 | 9744803446 |
24 | 26489122130 |
25 | 72004899337 |
26 | 195729609429 |
27 | 532048240602 |
28 | 1446257064291 |
29 | 3931334297144 |
30 | 10686474581524 |
[1,3,7,20,55,148,403,1097,2981,8103,22026,59874, 162755,442413,1202604,3269017,8886111,24154953, 65659969,178482301,485165195,1318815734, 3584912846,9744803446,26489122130,72004899337, 195729609429,532048240602,1446257064291, 3931334297144,10686474581524] |