# A052601 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 12
4 48
5 240
6 4320
7 50400
8 564480
9 9434880
10 166924800
11 2953843200
12 60354201600
13 1357490534400
14 31907254579200
15 808142759424000
16 22052620541952000
17 635257746579456000
18 19347973338710016000