# A075533 (b-file synthesized from sequence entry)
1 1
2 2
3 0
4 12
5 0
6 0
7 840
8 0
9 0
10 50400
11 831600
12 0
13 0
14 302702400
15 1135134000
16 14529715200
17 0
18 2315673360000
19 15545887156800
20 140792940288000
21 443497761907200
22 28006062372288000
23 623360743125120000