Triangle read by rows: row n gives denominators of Farey series of order n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =1a(6) =3a(7) =2a(8) =3a(9) =1a(10) =1a(11) =4a(12) =3a(13) =2a(14) =3a(15) =4a(16) =1a(17) =1a(18) =5a(19) =4a(20) =3a(21) =5a(22) =2a(23) =5a(24) =3a(25) =4a(26) =5a(27) =1a(28) =1a(29) =6