Triangle T(n,k) = number of distinct products i*j with k<=i,j<=n, for 0<=k<=n.

Terms

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