Search: id:A028878
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%I A028878
%S A028878 3,10,19,30,43,58,75,94,115,138,163,190,219,250,283,318,355,394,435,
%T A028878 478,523,570,619,670,723,778,835,894,955,1018,1083,1150,1219,1290,
%U A028878 1363,1438,1515,1594,1675,1758,1843,1930,2019,2110,2203,2298,2395
%N A028878 a(n) = (n+3)^2 - 6.
%H A028878 P. De Geest, <a href="http://www.worldofnumbers.com/consemor.htm">Palindromic 
               Quasipronics of the form n(n+x)</a>
%F A028878 a(n)=2*n+a(n-1)+3 (with a(1)=3) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), 
               Nov 07 2009]
%e A028878 For n=2, a(2)=2*2+3+3=10; n=3, a(3)=2*3+10+3=19; n=4, a(4)=2*4+19+3=30 
               [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 07 2009]
%t A028878 s=0;lst={};Do[s+=n;If[(s-6)>0,AppendTo[lst,s-6]],{n,1,6!,2}];lst [From 
               Vladimir Orlovsky (4vladimir(AT)gmail.com), May 25 2009]
%o A028878 (Other) SAGE:[lucas_number2(2,n,3) for n in xrange(3,50)]# [From Zerinvary 
               Lajos (zerinvarylajos(AT)yahoo.com), Mar 12 2009]
%Y A028878 Sequence in context: A074178 A127852 A064027 this_sequence A010896 A135446 
               A160002
%Y A028878 Adjacent sequences: A028875 A028876 A028877 this_sequence A028879 A028880 
               A028881
%K A028878 nonn,new
%O A028878 0,1
%A A028878 Patrick De Geest (pdg(AT)worldofnumbers.com)
%E A028878 Definition corrected by Omar E. Pol (info(AT)polprimos.com), Jul 27 2009

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