Search: id:A106176
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%I A106176
%S A106176 0,16,1440,389295,33994015,1802660535,2968421391,157411709575,
%T A106176 13745486642391,3714721448623416,324376465956415720,
%U A106176 17201282202880383816,28325163305411682840,1502048325307681783960
%N A106176 Numbers k such that 67*(k^2) + 67*k + 1 = n^2.
%F A106176 a(1)=0, a(2)=16, a(3)=1440, a(4)=389295, a(5)=33994015, a(6)=1802660535, 
               a(7)=9542163854*a(1)+4771081926-a(6), a(8)=9542163854*a(2)+4771081926-a(5), 
               a(9)=9542163854*a(3)+4771081926-a(4), a(10)=9542163854*a(4)+4771081926-a(3), 
               a(11)=9542163854*a(5)+4771081926-a(2), a(12)=9542163854*a(6)+4771081926-a(1), 
               then a(n)=9542163854*a(n-6)+4771081926-a(n-12)
%Y A106176 Cf. A106175.
%Y A106176 Sequence in context: A134375 A057994 A160251 this_sequence A086815 A054947 
               A071900
%Y A106176 Adjacent sequences: A106173 A106174 A106175 this_sequence A106177 A106178 
               A106179
%K A106176 nonn
%O A106176 1,2
%A A106176 Pierre CAMI (pierrecami(AT)tele2.fr), Apr 24 2005

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