# A145614 (b-file synthesized from sequence entry)
1 2
2 4
3 20
4 280
5 280
6 3080
7 5720
8 2288
9 116688
10 3695120
11 25865840
12 594914320
13 2974571600
14 8923714800
15 86262576400
16 5348279736800
17 5348279736800
18 16044839210400
19 197886350261600
20 15222026943200
21 89157586381600