Triangle read by rows in which row n lists the divisors of n.

Terms

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