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A090379 a(n) = Abs[Floor[(PrimePi[n]-2)/(2-PrimePi[n]+PrimePi[n-1])]] 0
1, 1, 0, 0, 1, 0, 2, 1, 1, 1, 3, 1, 4, 2, 2, 2, 5, 2, 6, 3, 3, 3, 7, 3, 3, 3, 3, 3, 8, 4, 9, 4, 4, 4, 4, 4, 10, 5, 5, 5, 11, 5, 12, 6, 6, 6, 13, 6, 6, 6, 6, 6, 14, 7, 7, 7, 7, 7, 15, 7, 16, 8, 8, 8, 8, 8, 17, 8, 8, 8, 18, 9, 19, 9, 9, 9, 9, 9, 20, 10, 10, 10, 21, 10, 10, 10, 10, 10, 22, 11, 11, 11 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

COMMENTS

A chaotic function based on the distribution of primes and the information in the composite numbers.

LINKS

Table of n, a(n) for n=1..92.

MATHEMATICA

f[n_] := Abs[Floor[(PrimePi[n] - 2)/(2 - PrimePi[n] + PrimePi[n - 1])]]; Table[ f[n], {n, 1, 92}]

CROSSREFS

Sequence in context: A161204 A123541 A324537 * A254655 A077254 A074761

Adjacent sequences:  A090376 A090377 A090378 * A090380 A090381 A090382

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Jan 29 2004

STATUS

approved

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Last modified September 22 03:54 EDT 2020. Contains 337289 sequences. (Running on oeis4.)