# A208654 (b-file synthesized from sequence entry)
1 1
2 2
3 18
4 144
5 12000
6 540000
7 388962000
8 108425318400
9 650403212820480
10 1175952237465600000
11 57409367332363200000000
12 691636564481660937216000000
13 270540272566435932512004833280000