Search: id:A144928
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%I A144928
%S A144928 49,53441,5878461,646577269,71117621129,7822291746921,860380974540181,
%T A144928 94634084907672989,10408888958869488609,1144883151390736074001
%N A144928 Values of k arising in A144927.
%F A144928 a(n+2)=110*a(n+1)-a(n) [From Richard Choulet (richardchoulet(AT)yahoo.fr), 
               Oct 16 2008]
%F A144928 a(n)=(49/2)*{[55+12*sqrt(21)]^n+[55-12*sqrt(21)]^n}+(25373/252)*sqrt(21)*{[55+12*sqrt(21)]^n-[55-12*sqrt(21)]\
               ^n }, with n>=0 [From Paolo P. Lava (ppl(AT)spl.at), Nov 25 2008]
%e A144928 a(1)=49 because (7+7)^3-7^3=49^2 [From Richard Choulet (richardchoulet(AT)yahoo.fr), 
               Oct 16 2008]
%Y A144928 Sequence in context: A145251 A013741 A100418 this_sequence A134725 A013843 
               A023936
%Y A144928 Adjacent sequences: A144925 A144926 A144927 this_sequence A144929 A144930 
               A144931
%K A144928 nonn
%O A144928 1,1
%A A144928 Richard Choulet (richardchoulet(AT)yahoo.fr), Sep 25 2008
%E A144928 Numbers k such that exists x in N : (x+7)^3-x^3=k^2 Richard Choulet (richardchoulet(AT)yahoo.fr), 
               Oct 16 2008

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