# A016190 (b-file synthesized from sequence entry)
0 1
1 20
2 301
3 4040
4 51001
5 620060
6 7352101
7 85656080
8 985263601
9 11225320100
10 126965305501
11 1427999420120
12 15990423157801
13 178436520564140
14 1985678518660501
15 22048354837360160
16 244384923399813601