# A012406 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 12
5 -60
6 90
7 -420
8 21728
9 -270144
10 1479240
11 -9807600
12 330821832
13 -6651092448
14 71604108576
15 -744095308320
16 20714430198528
17 -548875353239424
18 9233126375705280
19 -138948347142163584