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A020938 Greatest k such that (k-th prime) < (8 times n-th prime). 1

%I #11 May 07 2021 13:24:04

%S 6,9,12,16,23,27,32,36,42,50,53,62,66,68,74,82,91,93,99,103,106,115,

%T 121,127,137,139,143,147,150,154,170,175,183,186,195,197,204,213,217,

%U 221,226,229,241,243,248,250,263,276,280,282,284,292,293,304,310,317

%N Greatest k such that (k-th prime) < (8 times n-th prime).

%H Harvey P. Dale, <a href="/A020938/b020938.txt">Table of n, a(n) for n = 1..1000</a>

%t PrimePi[NextPrime[8#,-1]]&/@Prime[Range[60]] (* _Harvey P. Dale_, May 07 2021 *)

%Y Cf. A020900, A020901, A020934-A020940.

%K nonn

%O 1,1

%A _Clark Kimberling_

%E More terms from _Henry Bottomley_, Nov 13 2000

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Last modified May 8 19:26 EDT 2024. Contains 372341 sequences. (Running on oeis4.)