# A012923 (b-file synthesized from sequence entry)
0 1
1 -4
2 80
3 -4024
4 373376
5 -55810464
6 12218736768
7 -3690395100032
8 1469402675519488
9 -746064489482211840
10 470375829415840688128
11 -360567791801354924107776
12 330231250494338680414994432