n | a(n) |
---|---|
2 | 1 |
3 | 7 |
4 | 30 |
5 | 148 |
6 | 610 |
7 | 2823 |
8 | 11690 |
9 | 52952 |
10 | 221094 |
11 | 992190 |
12 | 4173708 |
13 | 18642456 |
14 | 78906516 |
15 | 351537963 |
16 | 1495497690 |
17 | 6652572976 |
18 | 28420125190 |
19 | 126308309058 |
20 | 541492971140 |
21 | 2405203008440 |
22 | 10341957297084 |
23 | 45920564571398 |
24 | 197952999374468 |
[1,7,30,148,610,2823,11690,52952,221094,992190, 4173708,18642456,78906516,351537963,1495497690, 6652572976,28420125190,126308309058,541492971140, 2405203008440,10341957297084,45920564571398, 197952999374468] |