n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 70 |
7 | 192 |
8 | 534 |
9 | 1500 |
10 | 4246 |
11 | 12092 |
12 | 34606 |
13 | 99442 |
14 | 286730 |
15 | 829168 |
16 | 2403834 |
17 | 6984234 |
18 | 20331558 |
19 | 59287740 |
20 | 173149662 |
21 | 506376222 |
22 | 1482730098 |
23 | 4346486256 |
24 | 12754363650 |
25 | 37461564504 |
26 | 110125172682 |
27 | 323990062452 |
28 | 953883382354 |
[1,2,4,10,26,70,192,534,1500,4246,12092,34606, 99442,286730,829168,2403834,6984234,20331558, 59287740,173149662,506376222,1482730098, 4346486256,12754363650,37461564504,110125172682, 323990062452,953883382354] |