n | a(n) |
---|---|
3 | 0 |
4 | 18 |
5 | 100 |
6 | 425 |
7 | 1666 |
8 | 6370 |
9 | 24228 |
10 | 92277 |
11 | 352594 |
12 | 1351933 |
13 | 5200130 |
14 | 20058103 |
15 | 77558534 |
16 | 300539938 |
17 | 1166802820 |
18 | 4537567325 |
19 | 17672631538 |
20 | 68923264009 |
21 | 269128936778 |
22 | 1052049481375 |
23 | 4116715363270 |
24 | 16123801840973 |
25 | 63205303218250 |
26 | 247959266473375 |
27 | 973469712823326 |
[0,18,100,425,1666,6370,24228,92277,352594, 1351933,5200130,20058103,77558534,300539938, 1166802820,4537567325,17672631538,68923264009, 269128936778,1052049481375,4116715363270, 16123801840973,63205303218250,247959266473375, 973469712823326] |