n | a(n) |
---|---|
3 | 1 |
4 | 2 |
5 | 6 |
6 | 16 |
7 | 36 |
8 | 104 |
9 | 215 |
10 | 635 |
11 | 1275 |
12 | 3786 |
13 | 7518 |
14 | 22344 |
15 | 44170 |
16 | 131264 |
17 | 259002 |
18 | 769578 |
19 | 1517418 |
20 | 4508580 |
21 | 8888495 |
22 | 26412001 |
23 | 52077234 |
24 | 154773696 |
25 | 305257251 |
26 | 907432695 |
27 | 1790353357 |
28 | 5323519838 |
29 | 10507386918 |
30 | 31251588060 |
[1,2,6,16,36,104,215,635,1275,3786,7518,22344, 44170,131264,259002,769578,1517418,4508580, 8888495,26412001,52077234,154773696,305257251, 907432695,1790353357,5323519838,10507386918, 31251588060] |