# A254939 (b-file synthesized from sequence entry)
1 1
2 4
3 36
4 120
5 2520
6 277200
7 5045040
8 183783600
9 4655851200
10 80313433200
11 32607253879200
12 2743667504978400
13 58772246027695200
14 5038384364010597600
15 56517528952814529600
16 34089489546705963770400
17 7391221142626702144764000