n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 76 |
4 | 353 |
5 | 1688 |
6 | 8257 |
7 | 41128 |
8 | 207905 |
9 | 1063932 |
10 | 5501073 |
11 | 28695252 |
12 | 150827073 |
13 | 798054000 |
14 | 4247388417 |
15 | 22722717328 |
16 | 122125206977 |
17 | 659101365812 |
18 | 3570473750929 |
19 | 19407758970268 |
20 | 105820555054241 |
21 | 578622868877704 |
22 | 3172136074486337 |
[1,4,17,76,353,1688,8257,41128,207905,1063932, 5501073,28695252,150827073,798054000,4247388417, 22722717328,122125206977,659101365812, 3570473750929,19407758970268,105820555054241, 578622868877704,3172136074486337] |