# A373715 (b-file synthesized from sequence entry)
0 1
1 6
2 42
3 284
4 1938
5 13188
6 89828
7 611640
8 4165218
9 28363252
10 193145388
11 1315249800
12 8956413716
13 60990068520
14 415321615368
15 2828197518960
16 19259058052098
17 131147584691796
18 893070155862492
19 6081501856336488
20 41412945154765212
21 282007973308889592