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A094898 Product of two prime sets. 0
7, 0, 0, 17, 0, 0, 0, 0, 0, 41, 0, 0, 0, 0, 0, 0, 71, 0, 0, 83, 0, 0, 0, 0, 101, 0, 0, 113, 0, 0, 0, 131, 0, 0, 0, 0, 0, 0, 0, 0, 167, 0, 0, 0, 0, 0, 0, 0, 197, 0, 0, 0, 0, 0, 0, 227, 0, 233, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 281, 0, 0, 0, 0, 0, 0, 311, 0, 317, 0, 0, 0, 0, 0, 0, 0, 0, 353, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A kind of prime information topology of primes as a product of boths sets being true. This result is a very strange set.

LINKS

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

FORMULA

a(n) = when the linear combination of information of two prime types of 4*m+1 and 4*m+3 are both prime.

MATHEMATICA

a=Table[If[PrimeQ[4*n+1]==True&&PrimeQ[4*n+3]==False, 1, 0], {n, 0, 200}] b=Table[If[PrimeQ[4*n+1]==False&&PrimeQ[4*n+3]==True, 1, 0], {n, 0, 200}] d=Table[If[PrimeQ[a[[n]]*(4*n+1)+b[[n]]*(4*n+3)]==True, a[[n]]*(4*n+1)+b[[n]]*(4*n+3), 0], {n, 1, 200}]

CROSSREFS

Cf. A094896, A094897.

Sequence in context: A240984 A235363 A211904 * A136115 A061846 A293530

Adjacent sequences:  A094895 A094896 A094897 * A094899 A094900 A094901

KEYWORD

nonn,uned,obsc

AUTHOR

Roger L. Bagula, Jun 14 2004

STATUS

approved

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Last modified August 21 18:38 EDT 2019. Contains 326168 sequences. (Running on oeis4.)