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 A085963 Denominators of Farey fractions with prime numerators and denominators. 0
 3, 5, 5, 3, 7, 5, 7, 5, 3, 7, 11, 11, 7, 5, 7, 11, 5, 11, 3, 7, 13, 11, 13, 11, 7, 13, 5, 7, 11, 13, 5, 11, 3, 7, 13, 17, 13, 17, 11, 13, 11, 7, 17, 13, 5, 17, 7, 11, 13, 5, 11, 17, 3, 7, 17, 13, 19, 17, 13, 19, 17, 11, 13, 19, 11, 7, 17, 19, 13, 5, 17, 7, 11, 13, 19, 5, 11, 17, 3, 19, 7 (list; graph; refs; listen; history; text; internal format)
 OFFSET 3,1 LINKS Table of n, a(n) for n=3..83. PROG (PARI) \ Farey sequence of order n fareyct(n) = { forprime(x=2, n, y = farey(x); \ print1(y", "); ) } farey(n) = { c=0; m=n*(n-2)+2; a=vector(m); forprime(x=1, n, forprime(y=x, n, v = x/y; if(v<1, c++; a[c]=v; ) ) ); a = vecsort(a); c=0; for(x=2, m, if(a[x]<>a[x-1] & a[x]<>0, print1(numerator(a[x])", "); c++; ) ); return(c) } CROSSREFS Cf. A085692. Sequence in context: A211023 A279494 A053670 * A282177 A184593 A328154 Adjacent sequences: A085960 A085961 A085962 * A085964 A085965 A085966 KEYWORD easy,nonn AUTHOR Cino Hilliard, Aug 17 2003 STATUS approved

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Last modified May 28 18:29 EDT 2024. Contains 372919 sequences. (Running on oeis4.)