Search: id:A060820
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%I A060820
%S A060820 5,25,61,113,181,265,365,481,613,761,925,1105,1301,1513,1741,1985,2245,
%T A060820 2521,2813,3121,3445,3785,4141,4513,4901,5305,5725,6161,6613,7081,7565,
%U A060820 8065,8581,9113,9661,10225,10805,11401,12013,12641,13285,13945,14621
%N A060820 a(n) = (2*n-1)^2 + (2*n)^2.
%D A060820 Marilyn vos Savant and Leonore Fleischer, Brain Building in Just 12 Weeks, 
               Bantam Books, New York, NY, 1991, pp. 104-105, 119.
%H A060820 Harry J. Smith, <a href="b060820.txt">Table of n, a(n) for n=1,...,1000</
               a>
%e A060820 a(1)=5 because 1^2+2^2=5. a(2)=25 because 3^2+4^2=25.
%o A060820 (PARI) { for (n=1, 1000, write("b060820.txt", n, " ", (2*n - 1)^2 + (2*n)^2); 
               ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 12 2009]
%Y A060820 Sequence in context: A146412 A152734 A080856 this_sequence A146404 A054994 
               A108403
%Y A060820 Adjacent sequences: A060817 A060818 A060819 this_sequence A060821 A060822 
               A060823
%K A060820 easy,nonn
%O A060820 1,1
%A A060820 Jason Earls (zevi_35711(AT)yahoo.com), May 05 2001

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