# A091673 (b-file synthesized from sequence entry)
2 1
3 1092
4 793884
5 480299820
6 261163522620
7 132358677731280
8 63798093049771080
9 29612552769907347240
10 13345042642324219106280
11 5872442544965392834838400
12 2533775368098060137659608000
13 1075256447734638237381213700800