# A004376 (b-file synthesized from sequence entry)
8 1
9 63
10 2415
11 73150
12 1929501
13 46504458
14 1052618392
15 22760723700
16 475491062970
17 9672348219898
18 192657357567675
19 3773073433365600
20 72880766421258705
21 1391807041381659420
22 26327386978706181060