n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 7 |
5 | 25 |
6 | 61 |
7 | 121 |
8 | 283 |
9 | 841 |
10 | 2521 |
11 | 6769 |
12 | 17119 |
13 | 44665 |
14 | 123685 |
15 | 347497 |
16 | 954787 |
17 | 2578297 |
18 | 7001617 |
19 | 19307089 |
20 | 53601175 |
21 | 148305817 |
22 | 408681997 |
23 | 1127558041 |
24 | 3124344427 |
25 | 8681565865 |
26 | 24127128841 |
27 | 67020060721 |
28 | 186282015823 |
[1,1,1,1,7,25,61,121,283,841,2521,6769,17119, 44665,123685,347497,954787,2578297,7001617, 19307089,53601175,148305817,408681997,1127558041, 3124344427,8681565865,24127128841,67020060721, 186282015823] |