n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 12 |
4 | 33 |
5 | 87 |
6 | 222 |
7 | 550 |
8 | 1327 |
9 | 3129 |
10 | 7236 |
11 | 16464 |
12 | 36957 |
13 | 82027 |
14 | 180346 |
15 | 393354 |
16 | 852123 |
17 | 1835181 |
18 | 3932352 |
19 | 8388820 |
20 | 17826025 |
21 | 37748991 |
22 | 79692054 |
23 | 167772462 |
24 | 352321863 |
25 | 738197857 |
26 | 1543504252 |
27 | 3221225880 |
28 | 6710886837 |
[1,4,12,33,87,222,550,1327,3129,7236,16464,36957, 82027,180346,393354,852123,1835181,3932352, 8388820,17826025,37748991,79692054,167772462, 352321863,738197857,1543504252,3221225880, 6710886837] |