# A136592 (b-file synthesized from sequence entry)
2 1
3 3
4 -13
5 -10
6 394
7 -2016
8 -5076
9 170064
10 -1155024
11 -5005440
12 193724640
13 -1656720000
14 -10280355840
15 465087087360
16 -4804977542400
17 -39012996556800
18 2035558551398400
19 -24660231399014400
20 -248246498826547200
21 14713557956794368000