Search: id:A086970
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%I A086970
%S A086970 1,5,3,9,7,13,11,17,15,21,19,25,23,29,27,33,31,37,35,41,39,45,43,49,47,
%T A086970 53,51,57,55,61,59,65,63,69,67,73,71,77,75,81,79,85,83,89,87,93,91,97,
%U A086970 95,101,99,105,103,109,107,113,111,117,115,121,119
%N A086970 Fix 1, then pair-reverse the following odd numbers.
%C A086970 Partial sums are A086955.
%C A086970 Except for the first term, a(n)=4*n-a(n-1), (with a(1)=5) [From Vincenzo 
               Librandi (vincenzo.librandi(AT)tin.it), Oct 17 2009]
%F A086970 G.f.: (1+4x-3x^2+2x^3)/((1+x)(1-x)^2)
%Y A086970 Cf. A004442.
%Y A086970 Sequence in context: A161501 A118273 A073891 this_sequence A019955 A075693 
               A082454
%Y A086970 Adjacent sequences: A086967 A086968 A086969 this_sequence A086971 A086972 
               A086973
%K A086970 easy,nonn
%O A086970 0,2
%A A086970 Paul Barry (pbarry(AT)wit.ie), Jul 26 2003

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