# A227312 (b-file synthesized from sequence entry)
1 4
2 -16
3 64
4 -224
5 864
6 -3328
7 12800
8 -49408
9 190864
10 -736896
11 2845440
12 -10987520
13 42426752
14 -163825664
15 632592384
16 -2442673664
17 9432071040
18 -36420732160
19 140633977856
20 -543040041984
21 2096879372288
22 -8096830353408
23 31264870391808
24 -120725281128448
25 466165166208064
26 -1800036911561216
27 6950611323771904