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A081385 Incorrect version of A006254 (or A111333). 0

%I #13 Feb 16 2022 11:14:39

%S 1,2,3,4,5,6,7,8,9,10,16,17,18,19,20,26,27,28,29,30,36,37,38,39,40,46,

%T 47,48,49,50,51,52,53,54,56,57,58,59,60,61,62,63,64,65

%N Incorrect version of A006254 (or A111333).

%C Name was: Numbers just more than half-prime.

%D M. J. Halm, More Sequences, Mpossibilities 83, 2003.

%H M. J. Halm, <a href="http://untilheaven.tripod.com/id112.htm">Sequences</a>

%F a(n) = [p(n)/2 + 1/2].

%e a(11) = 16 because [(31)/2 + 1/2]=16.

%o (PARI) a(n) = ceil(prime(n)/2); \\ _Michel Marcus_, Aug 13 2013

%Y Cf. A000040.

%K dead

%O 1,2

%A _Michael Joseph Halm_, Apr 20 2003

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Last modified April 16 01:40 EDT 2024. Contains 371696 sequences. (Running on oeis4.)