Smallest a(n)>a(n-1) such that a(n)^2+a(n-1)^2 is a perfect square, a(1)=11.

Terms

a(0) =11a(1) =60a(2) =63a(3) =84a(4) =112a(5) =180a(6) =189a(7) =252a(8) =275a(9) =660a(10) =693a(11) =924a(12) =1232a(13) =1326a(14) =1768a(15) =1974a(16) =2632a(17) =4026a(18) =5368a(19) =6405a(20) =8200a(21) =8319a(22) =11092a(23) =11715a(24) =15620a(25) =16401a(26) =19720a(27) =20706a(28) =20880a(29) =20910