# A157397 (b-file synthesized from sequence entry) 1 1 2 1 3 5 4 1 5 15 6 45 7 1 8 105 9 180 10 585 11 1 12 425 13 2700 14 2925 15 9945 16 1 17 3075 18 34650 19 52650 20 59670 21 208845 22 1 23 15855 24 308700 25 1248975 26 1253070 27 1461915 28 5221125 29 1 30 123515 31 4475520 32 23689575 33 33972120 34 35085960 35 41769000