# A012611 (b-file synthesized from sequence entry)
0 0
1 2
2 4
3 -10
4 -2872
5 -158102
6 -16416820
7 -978422562
8 -208568114544
9 49226001618
10 -7815364604207468
11 2061047671608594374
12 -1093492387339592903336
13 671330623551827250908986
14 -418843222601740399516096420
15 353969402613094069055715957934