# A012717 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 7
4 36
5 293
6 2710
7 31099
8 408072
9 6199465
10 105183658
11 1990233551
12 41337728300
13 937722749325
14 23029648705726
15 609300643351555
16 17268619403747600
17 522102791124578001
18 16771008730706230098