n | a(n) |
---|---|
1 | 4 |
2 | 14 |
3 | 56 |
4 | 331 |
5 | 1324 |
6 | 12284 |
7 | 49136 |
8 | 663061 |
9 | 2652244 |
10 | 49164554 |
11 | 196658216 |
12 | 4798037791 |
13 | 19192151164 |
14 | 596372040824 |
15 | 2385488163296 |
16 | 91991577140521 |
17 | 367966308562084 |
18 | 17244625801225094 |
19 | 68978503204900376 |
20 | 3861296322290987251 |
[4,14,56,331,1324,12284,49136,663061,2652244, 49164554,196658216,4798037791,19192151164, 596372040824,2385488163296,91991577140521, 367966308562084,17244625801225094, 68978503204900376,3861296322290987251] |