# A050735 (b-file synthesized from sequence entry) 0 1 1 5 2 25 3 125 4 625 5 3125 6 15625 7 78125 8 390625 9 1953125 10 9765625 11 6103515625 12 30517578125 13 152587890625 14 762939453125 15 3814697265625 16 19073486328125 17 95367431640625 18 476837158203125 19 2384185791015625 20 7450580596923828125