# A056487 (b-file synthesized from sequence entry) 0 1 1 3 2 5 3 15 4 25 5 75 6 125 7 375 8 625 9 1875 10 3125 11 9375 12 15625 13 46875 14 78125 15 234375 16 390625 17 1171875 18 1953125 19 5859375 20 9765625 21 29296875 22 48828125 23 146484375 24 244140625 25 732421875 26 1220703125 27 3662109375 28 6103515625 29 18310546875 30 30517578125 31 91552734375