# A073967 (b-file synthesized from sequence entry) 1 0 2 0 3 6 4 25 5 125 6 600 7 3150 8 15750 9 78625 10 390625 11 1952500 12 9762500 13 48831250 14 244140625 15 1220703125 16 6103437500 17 30517656250 18 152588281250 19 762941015625 20 3814697265625 21 19073484375000 22 95367421875000 23 476837167968750 24 2384185791015625 25 11920928955078125