# A045993 (b-file synthesized from sequence entry)
0 1
1 9
2 72
3 566
4 4436
5 34748
6 272160
7 2131624
8 16695344
9 130761488
10 1024151680
11 8021372768
12 62825089344
13 492059397056
14 3853913344512
15 30184665012864
16 236412685103872
17 1851634187563264
18 14502390863865856
19 113585794743350784