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 A277646 Triangle T(n,k) = floor(n^2/k) for 1 <= k <= n^2, read by rows. 6
 1, 4, 2, 1, 1, 9, 4, 3, 2, 1, 1, 1, 1, 1, 16, 8, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 25, 12, 8, 6, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 36, 18, 12, 9, 7, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 49, 24, 16, 12, 9, 8, 7, 6 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA T(n,k) = A010766(n^2,k). EXAMPLE The first five rows of the triangle are: 1; 4, 2, 1, 1; 9, 4, 3, 2, 1, 1, 1, 1, 1; 16, 8, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1; 25, 12, 8, 6, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1; MATHEMATICA Table[Floor[n^2/k], {n, 7}, {k, n^2}] // Flatten (* Michael De Vlieger, Nov 24 2016 *) PROG (MAGMA) A277646:=func; [A277646(n, k):k in[1..n^2], n in[1..7]]; CROSSREFS Cf. Related triangles: A010766, A277647, A277648. Rows of this triangle (with infinite trailing zeros): T(1,k) = A000007(k-1), T(2,k) = A033324(k), T(3,k) = A033329(k), T(4,k) = A033336(k), T(5,k) = A033345(k), T(6,k) = A033356(k), T(7,k) = A033369(k), T(8,k) = A033384(k), T(9,k) = A033401(k), T(10,k) = A033420(k), T(100,k) = A033422(k), T(10^3,k) = A033426(k), T(10^4,k) = A033424(k). Columns of this triangle: T(n,1) = A000290(n), T(n,2) = A007590(n), T(n,3) = A000212(n), T(n,4) = A002620(n), T(n,5) = A118015(n), T(n,6) = A056827(n), T(n,7) = A056834(n), T(n,8) = A130519(n+1), T(n,9) = A056838(n), T(n,10)= A056865(n), T(n,12)= A174709(n+2). Sequence in context: A024553 A051568 A016509 * A010313 A159823 A075826 Adjacent sequences:  A277643 A277644 A277645 * A277647 A277648 A277649 KEYWORD nonn,tabf,easy AUTHOR Jason Kimberley, Nov 09 2016 STATUS approved

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Last modified October 23 22:42 EDT 2019. Contains 328378 sequences. (Running on oeis4.)