# A012452 (b-file synthesized from sequence entry)
0 0
1 2
2 0
3 400
4 -2688
5 1873408
6 -60938240
7 49450805248
8 -4291105193984
9 4345356280528896
10 -769792296435580928
11 962815994229666349056
12 -298377426990773724774400
13 452668537171760533299265536