n | a(n) |
---|---|
12 | 1 |
13 | 26 |
14 | 378 |
15 | 4060 |
16 | 35960 |
17 | 278256 |
18 | 1947792 |
19 | 12620256 |
20 | 76904685 |
21 | 445891810 |
22 | 2481256778 |
23 | 13340783196 |
24 | 69668534468 |
25 | 354860518600 |
26 | 1768966344600 |
27 | 8654327655120 |
28 | 41648951840265 |
29 | 197548686920970 |
30 | 925029565741050 |
31 | 4282083008118300 |
32 | 19619725782651120 |
33 | 89067326568860640 |
[1,26,378,4060,35960,278256,1947792,12620256, 76904685,445891810,2481256778,13340783196, 69668534468,354860518600,1768966344600, 8654327655120,41648951840265,197548686920970, 925029565741050,4282083008118300, 19619725782651120,89067326568860640] |