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A133555 Order of A113709(n) among composite positive integers. 1
1, 2, 3, 6, 9, 10, 11, 14, 19, 24, 27, 28, 29, 32, 37, 42, 47, 48, 51, 56, 57, 60, 71, 74, 75, 76, 79, 82, 95, 96, 99, 104, 105, 114, 119, 124, 125, 128, 133, 138, 147, 148, 151, 152, 157, 168, 175, 178, 181, 182, 187, 196, 197, 202, 207, 212, 217, 220, 221, 228, 231 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..62.

FORMULA

a(n) = A066246(A133709(n)). - R. J. Mathar, Jan 12 2008

EXAMPLE

The 10th prime - the 9th prime = 29-23 = 6. The integer between 23 and 29 that is divisible by 6 is 24. 24 is the 14th composite, so a(9) = 14.

MAPLE

A113709 := proc(n) local d, a ; d := ithprime(n+1)-ithprime(n) ; for a from ithprime(n)+1 do if a mod d = 0 then RETURN(a) ; fi ; od: end: A066246 := proc(n) local a, i; if n = 1 or isprime(n) then 0 ; else a := 0 ; for i from 4 to n do if not isprime(i) then a := a+1 ; fi ; od: RETURN(a) ; fi ; end: A133555 := proc(n) A066246(A113709(n)) ; end: seq(A133555(n), n=2..80) ; # R. J. Mathar, Jan 12 2008

CROSSREFS

Cf. A113709.

Sequence in context: A061910 A007086 A047404 * A032938 A188323 A090892

Adjacent sequences:  A133552 A133553 A133554 * A133556 A133557 A133558

KEYWORD

nonn

AUTHOR

Leroy Quet, Dec 25 2007

EXTENSIONS

More terms from R. J. Mathar, Jan 12 2008

STATUS

approved

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Last modified December 11 05:07 EST 2016. Contains 279034 sequences.