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 A117811 Two-column table read by rows: row n (n >= 1) gives a squarefree integer x and an integer y such that n = x*y^2. 2
 1, 1, 2, 1, 3, 1, 1, 2, 5, 1, 6, 1, 7, 1, 2, 2, 1, 3, 10, 1, 11, 1, 3, 2, 13, 1, 14, 1, 15, 1, 1, 4, 17, 1, 2, 3, 19, 1, 5, 2, 21, 1, 22, 1, 23, 1, 6, 2, 1, 5, 26, 1, 3, 3, 7, 2, 29, 1, 30, 1, 31, 1, 2, 4, 33, 1, 34, 1, 35, 1, 1, 6, 37, 1, 38, 1, 39, 1, 10, 2, 41, 1, 42, 1, 43, 1, 11 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS EXAMPLE Table begins: 1 1 2 1 3 1 1 2 (so 4 = 1*2^2) 5 1 6 1 7 1 2 2 (so 8 = 2*2^2) 1 3 10 1 11 1 3 2 13 1 14 1 15 1 1 4 PROG (MAGMA) at:=0; for n in [1..100] do print Squarefree(n); end for; CROSSREFS The two columns are A007913, A000188. Sequence in context: A206437 A296085 A007740 * A297381 A051793 A065371 Adjacent sequences:  A117808 A117809 A117810 * A117812 A117813 A117814 KEYWORD nonn,tabf AUTHOR N. J. A. Sloane, Dec 23 2006 STATUS approved

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Last modified October 1 16:55 EDT 2020. Contains 337443 sequences. (Running on oeis4.)