# A189840 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 24
5 108
6 544
7 3264
8 23040
9 171072
10 1409664
11 12916224
12 131217408
13 1428028032
14 16709309440
15 210367491840
16 2847184825728