n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 12 |
3 | 36 |
4 | 92 |
5 | 228 |
6 | 540 |
7 | 1236 |
8 | 2748 |
9 | 6004 |
10 | 12876 |
11 | 27252 |
12 | 57036 |
13 | 118308 |
14 | 243564 |
15 | 498564 |
16 | 1015484 |
17 | 2060484 |
18 | 4167804 |
19 | 8409588 |
20 | 16934748 |
21 | 34049940 |
22 | 68378220 |
23 | 137185428 |
24 | 275026476 |
25 | 551052676 |
26 | 1103618508 |
27 | 2209525092 |
28 | 4422484764 |
29 | 8850120420 |
30 | 17707920924 |
[1,4,12,36,92,228,540,1236,2748,6004,12876,27252, 57036,118308,243564,498564,1015484,2060484, 4167804,8409588,16934748,34049940,68378220, 137185428,275026476,551052676,1103618508, 2209525092,4422484764,8850120420,17707920924] |