# A135864 (b-file synthesized from sequence entry)
0 1
1 9
2 27
3 0
4 -81
5 243
6 0
7 -2916
8 10935
9 0
10 -168399
11 682344
12 0
13 -11711385
14 49364964
15 0
16 -900438201
17 3887490915
18 0
19 -73729998576
20 323480165085
21 0
22 -6303914878248
23 27978933759300
24 0
25 -556251967191492
26 2490404893915293
27 0
28 -50276620111538700
29 226626845346291663
30 0