# A288606 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 6 4 26 5 120 6 474 7 -3500 8 -169744 9 -4739628 10 -122528220 11 -3244006128 12 -89971866744 13 -2643601630488 14 -82449886989120 15 -2730313541889120 16 -95853665484598656 17 -3561107748108889344 18 -139703010646898138688 19 -5774800668716738596896 20 -250987866830927324395200