n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 16 |
3 | 46 |
4 | 124 |
5 | 310 |
6 | 748 |
7 | 1750 |
8 | 4012 |
9 | 9046 |
10 | 20140 |
11 | 44374 |
12 | 96940 |
13 | 210262 |
14 | 453292 |
15 | 972118 |
16 | 2075308 |
17 | 4412758 |
18 | 9349804 |
19 | 19748182 |
20 | 41593516 |
21 | 87381334 |
22 | 183151276 |
23 | 383079766 |
24 | 799713964 |
25 | 1666536790 |
26 | 3467291308 |
27 | 7203018070 |
28 | 14942907052 |
29 | 30959555926 |
30 | 64066595500 |
31 | 132428158294 |
[1,4,16,46,124,310,748,1750,4012,9046,20140,44374, 96940,210262,453292,972118,2075308,4412758, 9349804,19748182,41593516,87381334,183151276, 383079766,799713964,1666536790,3467291308, 7203018070,14942907052,30959555926,64066595500, 132428158294] |