# A138024 (b-file synthesized from sequence entry) 1 1 2 -1 3 1 4 2 5 -4 6 2 7 -6 8 12 9 -12 10 4 11 24 12 -48 13 48 14 -32 15 8 16 -120 17 240 18 -240 19 160 20 -80 21 16 22 720 23 -1440 24 1440 25 -960 26 480 27 -192 28 32 29 -5040 30 10080 31 -10080 32 6720 33 -3360 34 1344 35 -448 36 64 37 40320 38 -80640 39 80640 40 -53760 41 26880 42 -10752 43 3584 44 -1024 45 128 46 -362880 47 725760 48 -725760 49 483840 50 -241920 51 96768 52 -32256 53 9216