Search: id:A140730
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%I A140730
%S A140730 1,2,3,4,5,10,15,20,25,50,75,100,125,250,375,500,625,1250,1875,2500,
%T A140730 3125,6250,9375,12500,15625,31250,46875,62500,78125,156250,234375,
%U A140730 312500,390625,781250,1171875,1562500,1953125,3906250,5859375,7812500
%N A140730 a(4*n)=5^n, a(4*n+1)=2*5^n, a(4*n+2)=3*5^n, a(4*n+3)=4*5^n.
%C A140730 a(n) = A140740(n+4,4).
%F A140730 a(n+1) = a(n) + a(n - n mod 4).
%F A140730 O.g.f.: (1+2x+3x^2+4x^3)/(1-5x^4). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               May 31 2008
%Y A140730 Cf. A000079, A038754, A133464, A037124.
%Y A140730 Sequence in context: A032940 A064419 A032543 this_sequence A134220 A099161 
               A033077
%Y A140730 Adjacent sequences: A140727 A140728 A140729 this_sequence A140731 A140732 
               A140733
%K A140730 nonn
%O A140730 0,2
%A A140730 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 26 2008

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