# A050389 (b-file synthesized from sequence entry)
1 1
2 -2
3 6
4 -23
5 102
6 -494
7 2530
8 -13456
9 73539
10 -410282
11 2326674
12 -13371039
13 77697536
14 -455749550
15 2694915548
16 -16047294182
17 96143497559
18 -579147165864
19 3505497238320
20 -21309996083015
21 130048125280624