Search: id:A008507
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%I A008507
%S A008507 0,0,0,1,1,2,2,3,5,5,7,8,8,9,11,13,13,15,16,16,18,19,21,24,25,25,26,26,
               27,
%T A008507 33,34,36,36,40,40,42,44,45,47,49,49,53,53,54,54,59,64,65,65,66,68,68,
               72,74,
%U A008507 76,78,78,80,81,81,85,91,92,92,93,99,101,105,105,106,108,111,113,115,116,
               118
%N A008507 Number of odd composite numbers less than n-th odd prime.
%F A008507 [(Odd Primes - 1)/2] - n for n > 0, or A005097(n) - A000027(n). For example, 
               A005097(1) - A000027(1) = 1 - 1 = 0, A005097(2) - A000027(2) = 2 
               - 2 = 0, A005097(9) - A000027(9) = 14 - 9 = 5. - William A. Tedeschi 
               (fynmun(AT)hotmail.com), Apr 25 2008
%Y A008507 Sequence in context: A089366 A113827 A033189 this_sequence A028364 A011971 
               A060048
%Y A008507 Adjacent sequences: A008504 A008505 A008506 this_sequence A008508 A008509 
               A008510
%K A008507 nonn
%O A008507 1,6
%A A008507 Gary Findley (chfindley(AT)alpha.nlu.edu)
%E A008507 More terms from David W. Wilson (davidwwilson(AT)comcast.net), Jan 13, 
               2000.

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