n | a(n) |
---|---|
1 | 4 |
2 | 21 |
3 | 143 |
4 | 1063 |
5 | 8385 |
6 | 68929 |
7 | 584467 |
8 | 5074924 |
9 | 44885325 |
10 | 402777151 |
11 | 3656032622 |
12 | 33492393634 |
13 | 309106153431 |
14 | 2870123507479 |
15 | 26783122426197 |
16 | 250971797533095 |
17 | 2359952229466124 |
18 | 22256979400698116 |
19 | 210440626023838163 |
20 | 1994088284872617955 |
21 | 18931694933036811169 |
[4,21,143,1063,8385,68929,584467,5074924,44885325, 402777151,3656032622,33492393634,309106153431, 2870123507479,26783122426197,250971797533095, 2359952229466124,22256979400698116, 210440626023838163,1994088284872617955, 18931694933036811169] |