# A071968 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 45
4 105
5 1575
6 10395
7 315315
8 45045
9 6891885
10 72747675
11 160044885
12 1003917915
13 21751554825
14 35137127025
15 2183521465125
16 4512611027925
17 76714387474725
18 40613499251325
19 3172365552631275