%I A117476
%S A117476 12,33,133,252,832,1525,4905,8944,28644,52185,167005,304212,973432,
%T A117476 1773133,5673633,10334632,33068412,60234705,192736885,351073644,
%U A117476 1123352944,2046207205,6547380825,11926169632,38160932052,69510810633
%N A117476 The values of a in a^2 + b^2 = c^2 where b - a = 23 and gcd(a,b,c)=1.
%C A117476 Values of c are in A117475
%F A117476 a(1)=12, a(2)=33, a(3)=133, a(4)=252, a(n) = 6*a(n-2) - a(n-4) + 46
%e A117476 a(5) = 6*133 - 12 + 46 = 832 and 832^2 + 855^2 = 1193^2 and 855-832=23 
               and gcd(832,855,1193)=1
%Y A117476 Cf. A117475.
%Y A117476 Sequence in context: A032604 A043161 A043941 this_sequence A122436 A063554 
               A059805
%Y A117476 Adjacent sequences: A117473 A117474 A117475 this_sequence A117477 A117478 
               A117479
%K A117476 nonn
%O A117476 1,1
%A A117476 Andras Erszegi (erszegi.andras(AT)chello.hu), Mar 19 2006