# A223889 (b-file synthesized from sequence entry)
0 0
1 0
2 1
3 7
4 66
5 1078
6 33812
7 2124864
8 269617328
9 68809824944
10 35197776962400
11 36032789666289920
12 73789365506598519808
13 302234307608870314427904
14 2475886847109430725963593728
15 40564851077856428731075010538496