# A253668 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 0 4 1 5 -1 6 0 7 1 8 1 9 2 10 0 11 1 12 3 13 -1 14 -6 15 0 16 1 17 5 18 2 19 2 20 24 21 0 22 1 23 7 24 11 25 -2 26 -6 27 -120 28 0 29 1 30 9 31 26 32 6 33 4 34 24 35 720 36 0 37 1 38 11 39 47 40 50 41 -6 42 -12 43 -120 44 -5040 45 0 46 1 47 13 48 74 49 154 50 24 51 12 52 48 53 720 54 40320 55 0 56 1 57 15 58 107 59 342 60 274 61 -24 62 -36 63 -240 64 -5040 65 -362880