# A012699 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 -3
4 16
5 -50
6 488
7 -3024
8 35376
9 -313704
10 4361472
11 -52901640
12 869275680
13 -13360922640
14 252154734960
15 -4681650438360
16 100596004131840
17 -2186713427586240
18 52870374675586560
19 -1312523172135192960