n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 9 |
4 | 25 |
5 | 63 |
6 | 183 |
7 | 513 |
8 | 1521 |
9 | 4455 |
10 | 13311 |
11 | 39609 |
12 | 118665 |
13 | 355023 |
14 | 1064583 |
15 | 3190833 |
16 | 9571041 |
17 | 28704375 |
18 | 86108751 |
19 | 258300009 |
20 | 774886905 |
21 | 2324581983 |
22 | 6973706583 |
23 | 20920883553 |
24 | 62762532561 |
25 | 188286889095 |
26 | 564860312991 |
27 | 1694578813209 |
28 | 5083735376745 |
29 | 15251199752943 |
[1,4,9,25,63,183,513,1521,4455,13311,39609,118665, 355023,1064583,3190833,9571041,28704375,86108751, 258300009,774886905,2324581983,6973706583, 20920883553,62762532561,188286889095,564860312991, 1694578813209,5083735376745,15251199752943] |