n | a(n) |
---|---|
6 | 1 |
7 | 17 |
8 | 145 |
9 | 836 |
10 | 3846 |
11 | 15002 |
12 | 52132 |
13 | 164576 |
14 | 484609 |
15 | 1337597 |
16 | 3521517 |
17 | 8850458 |
18 | 21485321 |
19 | 50358968 |
20 | 114911640 |
21 | 255114977 |
22 | 554333346 |
23 | 1178070741 |
24 | 2459840199 |
25 | 5042845917 |
26 | 10185374250 |
27 | 20257833206 |
28 | 39778823250 |
29 | 77088115856 |
30 | 147739793527 |
31 | 279923493220 |
[1,17,145,836,3846,15002,52132,164576,484609, 1337597,3521517,8850458,21485321,50358968, 114911640,255114977,554333346,1178070741, 2459840199,5042845917,10185374250,20257833206, 39778823250,77088115856,147739793527,279923493220] |