n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 13 |
4 | 40 |
5 | 117 |
6 | 324 |
7 | 853 |
8 | 2152 |
9 | 5245 |
10 | 12436 |
11 | 28845 |
12 | 65736 |
13 | 147685 |
14 | 327940 |
15 | 721189 |
16 | 1573192 |
17 | 3408237 |
18 | 7340436 |
19 | 15729085 |
20 | 33554920 |
21 | 71303701 |
22 | 150995524 |
23 | 318767733 |
24 | 671089320 |
25 | 1409286877 |
26 | 2952790804 |
27 | 6174016333 |
28 | 12884902792 |
29 | 26843546565 |
30 | 55834575876 |
[0,1,4,13,40,117,324,853,2152,5245,12436,28845, 65736,147685,327940,721189,1573192,3408237, 7340436,15729085,33554920,71303701,150995524, 318767733,671089320,1409286877,2952790804, 6174016333,12884902792,26843546565,55834575876] |