n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 41 |
4 | 79 |
5 | 351 |
6 | 1559 |
7 | 3001 |
8 | 13329 |
9 | 59201 |
10 | 113959 |
11 | 506151 |
12 | 2248079 |
13 | 4327441 |
14 | 19220409 |
15 | 85367801 |
16 | 164328799 |
17 | 729869391 |
18 | 3241728359 |
19 | 6240166921 |
20 | 27715816449 |
21 | 123100309841 |
22 | 236962014199 |
23 | 1052471155671 |
24 | 4674570045599 |
25 | 8998316372641 |
26 | 39966188099049 |
27 | 177510561422921 |
[1,9,41,79,351,1559,3001,13329,59201,113959, 506151,2248079,4327441,19220409,85367801, 164328799,729869391,3241728359,6240166921, 27715816449,123100309841,236962014199, 1052471155671,4674570045599,8998316372641, 39966188099049,177510561422921] |