# A074513 (b-file synthesized from sequence entry)
0 3
1 12
2 66
3 408
4 2658
5 17832
6 121746
7 839928
8 5830338
9 40615752
10 283523826
11 1981521048
12 13858064418
13 96956119272
14 678491508306
15 4748635251768
16 33237225536898
17 232647693856392
18 1628482317387186
19 11399170063280088