# A137376 (b-file synthesized from sequence entry) 1 1 2 -1 3 1 4 -2 5 -1 6 1 7 -6 8 -7 9 0 10 1 11 -24 12 -38 13 -13 14 2 15 1 16 -120 17 -226 18 -125 19 -15 20 5 21 1 22 -720 23 -1524 24 -1076 25 -285 26 -5 27 9 28 1 29 -5040 30 -11628 31 -9604 32 -3521 33 -490 34 28 35 14 36 1 37 -40320 38 -99504 39 -91988 40 -41020 41 -8911 42 -616 43 98 44 20 45 1 46 -362880 47 -945936 48 -953532 49 -487432 50 -134757 51 -18375 52 -378 53 222 54 27 55 1 56 -3628800