Triangle read by rows: T(n,k) = k for n >= 1, k = 1..n.

Terms

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