n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 20 |
6 | 62 |
7 | 204 |
8 | 709 |
9 | 2526 |
10 | 9212 |
11 | 33989 |
12 | 126838 |
13 | 476597 |
14 | 1802618 |
15 | 6850969 |
16 | 26153537 |
17 | 100207548 |
18 | 385225375 |
19 | 1485216987 |
20 | 5741272625 |
21 | 22246000726 |
22 | 86383442996 |
23 | 336093551268 |
24 | 1309998354125 |
25 | 5114452295933 |
26 | 19998173607505 |
27 | 78306014924606 |
28 | 307022185565345 |
[1,1,3,7,20,62,204,709,2526,9212,33989,126838, 476597,1802618,6850969,26153537,100207548, 385225375,1485216987,5741272625,22246000726, 86383442996,336093551268,1309998354125, 5114452295933,19998173607505,78306014924606, 307022185565345] |