n | a(n) |
---|---|
1 | 4 |
2 | 18 |
3 | 55 |
4 | 150 |
5 | 379 |
6 | 915 |
7 | 2146 |
8 | 4934 |
9 | 11080 |
10 | 24833 |
11 | 54476 |
12 | 119091 |
13 | 259432 |
14 | 556700 |
15 | 1195135 |
16 | 2561094 |
17 | 5428597 |
18 | 11488866 |
19 | 24350993 |
20 | 51296325 |
21 | 107427025 |
22 | 225330244 |
23 | 472762497 |
24 | 985966379 |
25 | 2049357779 |
26 | 4267962522 |
27 | 8887535983 |
28 | 18431783744 |
[4,18,55,150,379,915,2146,4934,11080,24833,54476, 119091,259432,556700,1195135,2561094,5428597, 11488866,24350993,51296325,107427025,225330244, 472762497,985966379,2049357779,4267962522, 8887535983,18431783744] |