# A004366 (b-file synthesized from sequence entry)
11 1
12 72
13 3003
14 95284
15 2555190
16 61124064
17 1346548665
18 27883218168
19 550339251858
20 10456592670160
21 192657357567675
22 3461014728350400
23 60881281549022688
24 1052134368066259632
25 17910906207136060650