n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 13 |
3 | 38 |
4 | 103 |
5 | 264 |
6 | 649 |
7 | 1546 |
8 | 3595 |
9 | 8204 |
10 | 18445 |
11 | 40974 |
12 | 90127 |
13 | 196624 |
14 | 426001 |
15 | 917522 |
16 | 1966099 |
17 | 4194324 |
18 | 8912917 |
19 | 18874390 |
20 | 39845911 |
21 | 83886104 |
22 | 176160793 |
23 | 369098778 |
24 | 771751963 |
25 | 1610612764 |
26 | 3355443229 |
27 | 6979321886 |
28 | 14495514655 |
29 | 30064771104 |
30 | 62277025825 |
[1,4,13,38,103,264,649,1546,3595,8204,18445,40974, 90127,196624,426001,917522,1966099,4194324, 8912917,18874390,39845911,83886104,176160793, 369098778,771751963,1610612764,3355443229, 6979321886,14495514655,30064771104,62277025825] |