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 A163161 Values of n at which the sequence A161865/A161867 equals 1/2. 0
 5, 9, 14, 30, 44, 47, 64, 67, 72, 89, 99, 124, 125, 194, 198, 200, 208, 213, 214, 249, 267, 270, 320, 333, 372, 373, 374, 393, 455, 460, 475, 519, 586, 603, 643, 701, 704, 712, 770, 774, 789, 814, 825, 828, 836, 891, 906, 930, 941, 970, 974, 982, 983, 988, 1022 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The corresponding sequence for primes is A144264, and the ratio is given by sequences A161621/A161622. LINKS MATHEMATICA t1 = Table[ ((2n+1) - (PrimePi[(n+1)^2] - PrimePi[n^2]))/((4n+4)- (PrimePi[(n+2)^2] - PrimePi[n^2])), {n, 1, 100}]; t2= Position[t1, 1/2]; [From Daniel Tisdale, Jul 24 2009] CROSSREFS Sequence in context: A169872 A115380 A107980 * A188358 A228218 A314993 Adjacent sequences:  A163158 A163159 A163160 * A163162 A163163 A163164 KEYWORD nonn AUTHOR Daniel Tisdale, Jul 21 2009, Jul 24 2009 EXTENSIONS Corrected by the author, Jul 25 2009 Extended beyond 194 by R. J. Mathar, Sep 27 2009 STATUS approved

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Last modified August 19 04:34 EDT 2019. Contains 326109 sequences. (Running on oeis4.)