# A032108 (b-file synthesized from sequence entry)
1 3
2 9
3 81
4 972
5 14580
6 262440
7 5511240
8 132269760
9 3571283520
10 107138505600
11 3535570684800
12 127280544652800
13 4963941241459200
14 208485532141286400
15 9381848946357888000
16 450328749425178624000