# A158389 (b-file synthesized from sequence entry) 0 1 1 1 2 -1 3 -2 4 -1 5 1 6 -6 7 3 8 3 9 -1 10 24 11 8 12 -13 13 -3 14 1 15 120 16 -40 17 -61 18 17 19 6 20 -1 21 -720 22 -180 23 360 24 75 25 -45 26 -6 27 1 28 -5040 29 1260 30 2368 31 -529 32 -309 33 55 34 10 35 -1 36 40320 37 8064 38 -18296 39 -3256 40 2545 41 363 42 -115 43 -10 44 1 45 362880 46 -72576 47 -155736 48 28728 49 21609 50 -3465