# A055867 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 64
5 750
6 10584
7 175616
8 3359232
9 72900000
10 1771561000
11 47692136448
12 1409582685888
13 45392319784448
14 1582328671875000
15 59373627899904000
16 2386420683693101056
17 102303226385042448384
18 4659806991485780193672