%I A087113
%S A087113 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50
%N A087113 Essentially a duplicate of A005843.
%C A087113 Except for the first term of [A002522], and [A058331] if X=[A058331], 
               Y=[A087113], A= [A002522], we have, for all other terms, Pell's equation: 
               [A058331]^2 - [A002522]*[A087113]^2=1; (X^2-A*Y^2=1); example: 3^2-2*2^2=1; 
               9^2-5*4^2=1, 129^2-65*16^2=1, and so on. [From Vincenzo Librandi 
               (vincenzo.librandi(AT)tin.it), Feb 11 2009]
%Y A087113 Cf. A002522, A058331 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), 
               Feb 11 2009]
%Y A087113 Sequence in context: A055962 A055964 A055966 this_sequence A004275 A119432 
               A005843
%Y A087113 Adjacent sequences: A087110 A087111 A087112 this_sequence A087114 A087115 
               A087116
%K A087113 dead
%O A087113 1,1