# A013234 (b-file synthesized from sequence entry)
0 0
1 0
2 -1
3 0
4 -6
5 8
6 -105
7 448
8 -3780
9 29360
10 -231525
11 2498848
12 -20985426
13 271494104
14 -2503393893
15 35568205216
16 -346194368520
17 4969746747488
18 -41862411119529
19 433992302190016
20 4063211694577570
21 -232678981367758168