n | a(n) |
---|---|
5 | 1 |
6 | 15 |
7 | 141 |
8 | 1066 |
9 | 7108 |
10 | 43747 |
11 | 255045 |
12 | 1431320 |
13 | 7814385 |
14 | 41804990 |
15 | 220266447 |
16 | 1147232914 |
17 | 5922585396 |
18 | 30367092789 |
19 | 154877631181 |
20 | 786633449995 |
21 | 3982378528296 |
22 | 20109428513990 |
23 | 101339359244739 |
24 | 509871884291730 |
25 | 2562078441467318 |
26 | 12861324297841420 |
[1,15,141,1066,7108,43747,255045,1431320,7814385, 41804990,220266447,1147232914,5922585396, 30367092789,154877631181,786633449995, 3982378528296,20109428513990,101339359244739, 509871884291730,2562078441467318, 12861324297841420] |