# A112292 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 3 4 3 5 1 6 15 7 15 8 5 9 1 10 105 11 105 12 35 13 7 14 1 15 945 16 945 17 315 18 63 19 9 20 1 21 10395 22 10395 23 3465 24 693 25 99 26 11 27 1 28 135135 29 135135 30 45045 31 9009 32 1287 33 143 34 13 35 1 36 2027025 37 2027025 38 675675 39 135135 40 19305 41 2145 42 195 43 15 44 1 45 34459425 46 34459425 47 11486475 48 2297295 49 328185 50 36465 51 3315 52 255 53 17 54 1