# A344104 (b-file synthesized from sequence entry)
0 10
1 10
2 20
3 60
4 240
5 1200
6 8400
7 75600
8 831600
9 10810800
10 183783600
11 3491888400
12 73329656400
13 1686582097200
14 43851134527200
15 1227831766761600
16 36834953002848000
17 1289223355099680000
18 51568934203987200000
19 2372170973383411200000
20 123352890615937382400000