n | a(n) |
---|---|
7 | 1 |
8 | 6 |
9 | 37 |
10 | 195 |
11 | 975 |
12 | 4622 |
13 | 21128 |
14 | 94109 |
15 | 410820 |
16 | 1766591 |
17 | 7506179 |
18 | 31596240 |
19 | 131991619 |
20 | 547992183 |
21 | 2263477612 |
22 | 9309386178 |
23 | 38150082057 |
24 | 155859235424 |
25 | 635067478628 |
26 | 2581737704039 |
[1,6,37,195,975,4622,21128,94109,410820,1766591, 7506179,31596240,131991619,547992183,2263477612, 9309386178,38150082057,155859235424,635067478628, 2581737704039] |