Search: id:A065475
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%I A065475
%S A065475 1,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,
%T A065475 26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,
%U A065475 48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,
               71,72,73,74,75,76,77
%N A065475 Natural numbers excluding 2.
%C A065475 From the following 4 disjoint subsets of natural numbers A = {1}, B = 
               {2}, OP = {odd primes}, C = {composites}, 16 sets are derivable: 
               A000027 versus empty set, A002808 vs A008578, A065091 vs A065090, 
               A000040 vs A018252, A006005 vs {{2} with A002808}, {1} vs {A000027 
               excluding 1}, {2} versus this sequence, {1, 2} versus Union[OP, C].
%F A065475 Partial sums of A097330. G.f. : (1+x-x^2)/(1-x)^2 - Paul Barry (pbarry(AT)wit.ie), 
               Aug 05 2004
%p A065475 restart:printlevel := -1; a := [1]; T := x->LambertW(-x); f := series(((1+T(x)))/
               (1-T(x)), x, 77); for m from 3 to 77 do a := [op(a), op(2*m, f)] 
               od; print(a);# [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Mar 28 2009]
%Y A065475 Cf. A000027, A002808, A008578, A065091, A065090, A000040, A018252, A006005, 
               A002808.
%Y A065475 Sequence in context: A141213 A114637 A009056 this_sequence A062983 A081311 
               A053233
%Y A065475 Adjacent sequences: A065472 A065473 A065474 this_sequence A065476 A065477 
               A065478
%K A065475 nonn
%O A065475 1,2
%A A065475 Labos E. (labos(AT)ana.sote.hu), Nov 16 2001

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