# A164552 (b-file synthesized from sequence entry)
0 1
1 10
2 90
3 780
4 6660
5 56520
6 478440
7 4045680
8 34194960
9 288969120
10 2441780640
11 20632294080
12 174334109760
13 1473040494720
14 12446462643840
15 105166336884480
16 888602163298560
17 7508235853048320
18 63440765337623040
19 536042108460026880