# A052619 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 18
4 72
5 360
6 2160
7 15120
8 120960
9 1088640
10 10886400
11 119750400
12 1437004800
13 18681062400
14 261534873600
15 3923023104000
16 62768369664000
17 1067062284288000
18 19207121117184000
19 364935301226496000