Multiplication table read by antidiagonals: T(i,j) = i*j, i>=1, j>=1.

Terms

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