# A012964 (b-file synthesized from sequence entry)
0 1
1 0
2 -4
3 6
4 13
5 -20
6 -550
7 1470
8 23965
9 -91800
10 -1736800
11 5533550
12 261341425
13 -1560159900
14 -32046389050
15 113528073750
16 10312454985625
17 -82637650862000
18 -1992440583581500
19 7977656452281750