Integers whose sum of digits as well as product of digits is a nonzero square.

Terms

a(0) =1a(1) =4a(2) =9a(3) =22a(4) =88a(5) =144a(6) =414a(7) =441a(8) =466a(9) =646a(10) =664a(11) =889a(12) =898a(13) =988a(14) =1111a(15) =1177a(16) =1224a(17) =1242a(18) =1339a(19) =1393a(20) =1422a(21) =1717a(22) =1771a(23) =1933a(24) =2124a(25) =2142a(26) =2214a(27) =2241a(28) =2266a(29) =2338