# A012518 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 -12
5 60
6 -450
7 2940
8 -14000
9 34272
10 929880
11 -22680240
12 373861224
13 -5345779296
14 65277500288
15 -619227292320
16 1524395375360
17 135262063693184
18 -5049805793018304
19 129393583799366016