A136527 Triangle read by rows: T(n,k) = greatest common divisor of n-th and k-th composite number, 1<=k<=n.

4, 2, 6, 4, 2, 8, 1, 3, 1, 9, 2, 2, 2, 1, 10, 4, 6, 4, 3, 2, 12, 2, 2, 2, 1, 2, 2, 14, 1, 3, 1, 3, 5, 3, 1, 15, 4, 2, 8, 1, 2, 4, 2, 1, 16, 2, 6, 2, 9, 2, 6, 2, 3, 2, 18, 4, 2, 4, 1, 10, 4, 2, 5, 4, 2, 20, 1, 3, 1, 3, 1, 3, 7, 3, 1, 3, 1, 21, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 1, 22, 4, 6, 8, 3, 2, 12, 2, 3, 8, 6