# A007217 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 -2 4 15 5 -36 6 104 7 -312 8 1050 9 -3312 10 10734 11 -34518 12 113210 13 -370236 14 1220922 15 -4028696 16 13364424 17 -44409312