# A072260 (b-file synthesized from sequence entry)
0 6
1 33
2 165
3 789
4 3669
5 16725
6 75093
7 333141
8 1463637
9 6378837
10 27612501
11 118838613
12 508908885
13 2169853269
14 9216283989
15 39012619605
16 164640413013
17 692921390421
18 2909124515157