# A005948 (b-file synthesized from sequence entry)
0 0
1 6
2 52
3 411
4 3392
5 30070
6 287802
7 2969267
8 32902560
9 389989449
10 4924511300
11 65995764461
12 935412316380
13 13978234748257
14 219593721606826
15 3617245945896600
16 62330776215811680
17 1121143456571006754
18 21008889235589947362