# A292783 (b-file synthesized from sequence entry) 0 1 1 1 2 0 3 1 4 1 5 0 6 1 7 2 8 3 9 0 10 1 11 3 12 12 13 15 14 0 15 1 16 4 17 27 18 120 19 105 20 0 21 1 22 5 23 48 24 405 25 1680 26 945 27 0 28 1 29 6 30 75 31 960 32 8505 33 30240 34 10395 35 0 36 1 37 7 38 108 39 1875 40 26880 41 229635 42 665280 43 135135 44 0 45 1 46 8 47 147 48 3240 49 65625 50 967680 51 7577955 52 17297280 53 2027025 54 0 55 1 56 9 57 192 58 5145 59 136080 60 2953125 61 42577920 62 295540245 63 518918400 64 34459425 65 0