# A139151 (b-file synthesized from sequence entry)
4 7
5 31
6 181
7 1261
8 10081
9 90721
10 907201
11 9979201
12 119750401
13 1556755201
14 21794572801
15 326918592001
16 5230697472001
17 88921857024001
18 1600593426432001
19 30411275102208001
20 608225502044160001
21 12772735542927360001