Squares sandwiched between two numbers divisible by squares.

Terms

a(0) =49a(1) =1681a(2) =1849a(3) =3249a(4) =6724a(5) =8649a(6) =9801a(7) =11449a(8) =13689a(9) =13924a(10) =20449a(11) =24649a(12) =28224a(13) =37249a(14) =42849a(15) =57121a(16) =59049a(17) =63001a(18) =66049a(19) =85849a(20) =94249a(21) =106929a(22) =110224a(23) =117649a(24) =127449a(25) =135424a(26) =154449a(27) =165649a(28) =190969a(29) =196249