# A156093 (b-file synthesized from sequence entry)
0 0
1 -1
2 48
3 -2256
4 105985
5 -4979040
6 233908896
7 -10988739073
8 516236827536
9 -24252142155120
10 1139334444463105
11 -53524466747610816
12 2514510602693245248
13 -118128473859834915841
14 5549523760809547799280
15 -260709488284188911650320