# A276991 (b-file synthesized from sequence entry)
0 0
1 -1
2 0
3 -2
4 8
5 -86
6 1448
7 -40608
8 1867080
9 -140055600
10 17085644400
11 -3383043446640
12 1085946439923840
13 -564694233102890880
14 475471874409018791040
15 -648068513405723438730240
16 1429638846930684965104992000
17 -5103811083889432701541321459200