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A085962 Numerators of Farey fractions with prime numerators and denominators. 0
2, 2, 3, 2, 2, 2, 3, 3, 2, 5, 2, 3, 2, 2, 3, 5, 3, 7, 2, 5, 2, 2, 3, 3, 2, 5, 2, 3, 5, 7, 3, 7, 2, 5, 11, 2, 2, 3, 2, 3, 3, 2, 5, 5, 2, 7, 3, 5, 7, 3, 7, 11, 2, 5, 13, 11, 2, 2, 2, 3, 3, 2, 3, 5, 3, 2, 5, 7, 5, 2, 7, 3, 5, 7, 11, 3, 7, 11, 2, 13, 5, 13, 11, 17, 2, 2, 2, 3, 2, 3, 3, 2, 5, 3, 5, 3, 2, 5, 7, 7, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..103.

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. A085693.

Sequence in context: A278744 A082091 A100549 * A160821 A300225 A060244

Adjacent sequences:  A085959 A085960 A085961 * A085963 A085964 A085965

KEYWORD

easy,nonn,frac

AUTHOR

Cino Hilliard, Aug 17 2003

STATUS

approved

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Last modified May 20 03:10 EDT 2019. Contains 323412 sequences. (Running on oeis4.)