Number of ways to partition 1 into reduced fractions i/j with j <= n.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =13a(5) =22a(6) =36a(7) =59a(8) =107a(9) =189a(10) =244a(11) =494a(12) =594a(13) =1063a(14) =3276a(15) =5508a(16) =5804a(17) =12427a(18) =12916a(19) =42411a(20) =131773a(21) =167588a(22) =168842a(23) =428013a(24) =839368a(25) =1015502a(26) =1968162a(27) =5787287a(28) =5791851a(29) =15163759