n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 4 |
3 | 8 |
4 | 28 |
5 | 83 |
6 | 255 |
7 | 778 |
8 | 2377 |
9 | 7259 |
10 | 22173 |
11 | 67721 |
12 | 206844 |
13 | 631764 |
14 | 1929609 |
15 | 5893632 |
16 | 18001012 |
17 | 54980764 |
18 | 167928588 |
19 | 512906847 |
20 | 1566579211 |
21 | 4784826786 |
22 | 14614369465 |
23 | 44636891651 |
24 | 136335139273 |
25 | 416410496177 |
26 | 1271848932360 |
27 | 3884627600872 |
28 | 11864877355729 |
[1,0,4,8,28,83,255,778,2377,7259,22173,67721, 206844,631764,1929609,5893632,18001012,54980764, 167928588,512906847,1566579211,4784826786, 14614369465,44636891651,136335139273,416410496177, 1271848932360,3884627600872,11864877355729] |