# A368284 (b-file synthesized from sequence entry)
0 1
1 -1
2 3
3 0
4 32
5 182
6 1882
7 20500
8 260136
9 3701968
10 58565360
11 1019110848
12 19346296752
13 397867297136
14 8811800026928
15 209100451072672
16 5292665533921024
17 142338738348972672
18 4053176346277660288
19 121828547313861426176
20 3854597854165079424768