# A083108 (b-file synthesized from sequence entry)
1 1
2 3
3 10
4 105
5 216
6 95095
7 9360
8 2027025
9 3203200
10 5683048371
11 76204800
12 29248404810625
13 11975040000
14 1810763157864375
15 1951364659019776
16 191898783962510625
17 690452066304000
18 241664494761081051034375