# A003287 (b-file synthesized from sequence entry)
1 1
2 4
3 22
4 140
5 970
6 7196
7 56092
8 452064
9 3735700
10 31484244
11 269613896
12 2339571468
13 20529434520
14 181871459580
15 1624587752400
16 14617165101216