# A028511 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 4371
4 96256
5 1143745
6 9646891
7 64680601
8 366845011
9 1829005611
10 8223700027
11 33950840617
12 130416170627
13 470887671187
14 1610882889457
15 5254605009307
16 16428803075153
17 49446546607298
18 143782211788218