# A109774 (b-file synthesized from sequence entry)
1 0
2 8
3 104
4 1040
5 9680
6 88088
7 795704
8 7170080
9 64556960
10 581091368
11 5230058504
12 47071235120
13 423643241840
14 3812795553848
15 34315179116504
16 308836669444160
17 2779530197184320
18 25015772291219528
19 225141952170657704
20 2026277574184965200
21 18236498181611824400