# A375699 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 4
5 10
6 40
7 210
8 5264
9 45360
10 409800
11 4065600
12 77948640
13 1183422240
14 17527233360
15 267109642800
16 5422495921920
17 110998923235200
18 2270809072896000
19 47142009514454400
20 1116394268619772800
21 27963045712157472000
22 718066383283082803200