n | a(n) |
---|---|
7 | 1 |
8 | 5 |
9 | 31 |
10 | 173 |
11 | 1521 |
12 | 4224 |
13 | 33418 |
14 | 184183 |
15 | 1370009 |
16 | 3798472 |
17 | 26957026 |
18 | 150399317 |
19 | 1034714947 |
20 | 2897704261 |
21 | 19494273755 |
22 | 109619578524 |
23 | 724456628891 |
[1,5,31,173,1521,4224,33418,184183,1370009, 3798472,26957026,150399317,1034714947,2897704261, 19494273755,109619578524,724456628891] |