# A009536 (b-file synthesized from sequence entry)
0 1
1 -4
2 56
3 -1576
4 70912
5 -4668544
6 423673472
7 -50674728448
8 7717401038848
9 -1456461190426624
10 333308651379949568
11 -90869806167526899712
12 29082416014569110142976
13 -10791837753739463345963008