# A012826 (b-file synthesized from sequence entry) 0 1 1 -1 2 -7 3 -145 4 -2063 5 -128705 6 5154217 7 -510686033 8 254809389793 9 -27371394484993 10 18728499608356185 11 -5038330344345849489 12 3197858289863468529361 13 -1630641802209014177997505