Triangle read by rows: number of compositions of n into relatively prime summands.

Terms

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