Search: id:A141844
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%I A141844
%S A141844 1,6,27,113,458,1839,7365,29470,117891,471577,1886322,7545303,30181229,
%T A141844 120724935,482899761,1931599066,7726396287
%N A141844 a(n) = 4*a(n-1) + A042968(n), a(0) = 1; where A042968 = "not divisible 
               by 4": (1, 2, 3, 5, 6, 7, 9, 10, 11,...).
%F A141844 G.f.: (1+x)(1+x^2)/((1-x)^2(1+x+x^2)(1-4x)). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Sep 06 2008]
%e A141844 a(3) = 113 = 4*a(2) + A042968(3) = 4*27 + 5.
%Y A141844 Cf. A042968.
%Y A141844 Sequence in context: A108958 A005284 A014825 this_sequence A079742 A130019 
               A049651
%Y A141844 Adjacent sequences: A141841 A141842 A141843 this_sequence A141845 A141846 
               A141847
%K A141844 nonn
%O A141844 0,2
%A A141844 Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 11 2008

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