Squares whose product of digits is also a nonzero square.

Terms

a(0) =1a(1) =4a(2) =9a(3) =49a(4) =144a(5) =289a(6) =441a(7) =1444a(8) =7744a(9) =11236a(10) =11449a(11) =11664a(12) =11881a(13) =13689a(14) =14884a(15) =16384a(16) =16641a(17) =19881a(18) =21316a(19) =26896a(20) =28224a(21) =29241a(22) =29929a(23) =31684a(24) =36481a(25) =38416a(26) =41616a(27) =42436a(28) =42849a(29) =43264