Smallest a(n)>a(n-1) such that a(n)^2+a(n-1)^2 is a perfect square, a(1)=6.

Terms

a(0) =6a(1) =8a(2) =15a(3) =20a(4) =21a(5) =28a(6) =45a(7) =60a(8) =63a(9) =84a(10) =112a(11) =180a(12) =189a(13) =252a(14) =275a(15) =660a(16) =693a(17) =924a(18) =1232a(19) =1326a(20) =1768a(21) =1974a(22) =2632a(23) =4026a(24) =5368a(25) =6405a(26) =8200a(27) =8319a(28) =11092a(29) =11715