n | a(n) |
---|---|
15 | 1 |
16 | 16 |
17 | 136 |
18 | 816 |
19 | 3876 |
20 | 15504 |
21 | 54264 |
22 | 170544 |
23 | 490314 |
24 | 1307504 |
25 | 3268760 |
26 | 7726160 |
27 | 17383860 |
28 | 37442160 |
29 | 77558760 |
30 | 155117520 |
31 | 300540195 |
32 | 565722720 |
33 | 1037158320 |
34 | 1855967520 |
35 | 3247943160 |
36 | 5567902560 |
37 | 9364199760 |
38 | 15471286560 |
39 | 25140840660 |
40 | 40225345056 |
41 | 63432274896 |
[1,16,136,816,3876,15504,54264,170544,490314, 1307504,3268760,7726160,17383860,37442160, 77558760,155117520,300540195,565722720,1037158320, 1855967520,3247943160,5567902560,9364199760, 15471286560,25140840660,40225345056,63432274896] |