# A199580 (b-file synthesized from sequence entry) 0 0 1 2 2 1 3 -3 4 0 5 1 6 8 7 -4 8 -4 9 1 10 -30 11 30 12 15 13 -10 14 1 15 144 16 -216 17 -48 18 84 19 -18 20 1 21 -840 22 1680 23 0 24 -700 25 245 26 -28 27 1 28 5760 29 -14400 30 2880 31 6000 32 -3120 33 552 34 -40 35 1 36 -45360 37 136080 38 -52920 39 -52920 40 39690 41 -9702 42 1071 43 -54 44 1 45 403200 46 -1411200 47 806400 48 470400