# A046900 (b-file synthesized from sequence entry) 0 1 1 -1 2 1 3 1 4 -3 5 2 6 1 7 3 8 -10 9 6 10 -1 11 9 12 10 13 -42 14 24 15 -17 16 21 17 50 18 42 19 -216 20 120 21 -107 22 -33 23 230 24 294 25 216 26 -1320 27 720 28 -415 29 -1173 30 670 31 1974 32 1944 33 1320 34 -9360 35 5040 36 1231 37 -13515 38 -4510 39 11130 40 17064 41 14520 42 9360 43 -75600 44 40320 45 56671 46 -113739 47 -131230 48 20202 49 136296 50 157080 51 121680 52 75600