n | a(n) |
---|---|
4 | 1 |
5 | 4 |
6 | 14 |
7 | 49 |
8 | 174 |
9 | 628 |
10 | 2298 |
11 | 8504 |
12 | 31758 |
13 | 119483 |
14 | 452284 |
15 | 1720774 |
16 | 6574987 |
17 | 25214332 |
18 | 96997223 |
19 | 374153699 |
20 | 1446677555 |
21 | 5605337934 |
22 | 21758936146 |
23 | 84604366100 |
24 | 329453055975 |
25 | 1284626463105 |
26 | 5015200610785 |
27 | 19601107218591 |
28 | 76685359017750 |
29 | 300294650988857 |
30 | 1176939165980809 |
[1,4,14,49,174,628,2298,8504,31758,119483,452284, 1720774,6574987,25214332,96997223,374153699, 1446677555,5605337934,21758936146,84604366100, 329453055975,1284626463105,5015200610785, 19601107218591,76685359017750,300294650988857, 1176939165980809] |