# A000424 (b-file synthesized from sequence entry)
1 7
2 85
3 1660
4 48076
5 1942416
6 104587344
7 7245893376
8 628308907776
9 66687811660800
10 8506654697548800
11 1284292319599411200
12 226530955276874956800
13 46165213716463676620800
14 10765453901922078105600000
15 2848453606917036402278400000
16 848800150518516674081587200000