# A052858 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 3
4 16
5 65
6 456
7 3157
8 28624
9 276705
10 3136240
11 38531141
12 528468744
13 7837577761
14 126588882616
15 2194957583925
16 40854219413536
17 810192673705793
18 17082845929433952
19 381225135102420997