# A067767 (b-file synthesized from sequence entry)
4 4
5 90
6 1349
7 17220
8 203568
9 2312094
10 25691670
11 282000444
12 3074136464
13 33387698708
14 361969672904
15 3921901043440
16 42499598861832
17 460831546801414
18 5001468564165262
19 54341248085414380