# A013313 (b-file synthesized from sequence entry) 1 1 2 2 3 -1 4 -24 5 -115 6 242 7 9179 8 65296 9 -366535 10 -14288158 11 -124059241 12 1440362616 13 57563571845 14 541440703442 15 -11649746422861 16 -473630058916064 17 -4395343414984975 18 168230486159471042