# A084486 (b-file synthesized from sequence entry)
1 1
2 32
3 522
4 5776
5 50600
6 380424
7 2570932
8 16073600
9 94748400
10 533515240
11 2896652396
12 15268777440
13 78544641448
14 395875164104
15 1960998472260
16 9570684204544
17 46112171619296
18 219682468794600
19 1036237335593500