# A124740 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 3 5 1 6 5 7 15 8 35 9 7 10 189 11 35 12 385 13 1485 14 143 15 1001 16 2027025 17 5005 18 85085 19 459459 20 46189 21 20995 22 1249937325 23 1616615 24 7436429 25 324342711 26 71504125 27 132793375 28 1452095555625 29 7436429 30 215656441 31 6190283353629375 32 75969882625