OFFSET
1,2
COMMENTS
REFERENCES
R. B. Eggleton, J. S. Kimberley and J. A. MacDougall, Square-free rank of integers, submitted.
LINKS
EXAMPLE
The first five rows are:
1;
4, 2, 3;
9, 8, 3, 5, 6, 7;
16, 8, 12, 5, 6, 7, 10, 11, 13, 14, 15;
25, 18, 12, 20, 24, 7, 10, 11, 13, 14, 15, 17, 19, 21, 22, 23;
MATHEMATICA
DeleteCases[#, 0] & /@ Table[Boole[SquareFreeQ@ k] k Floor[n/Sqrt@ k]^2, {n, 7}, {k, n^2}] // Flatten (* Michael De Vlieger, Nov 24 2016 *)
PROG
CROSSREFS
KEYWORD
nonn,tabf,easy
AUTHOR
Jason Kimberley, Nov 15 2016
STATUS
approved