Numbers whose concatenation of prime factors (with multiplicity) is a square.

Terms

a(0) =10a(1) =20a(2) =145a(3) =178a(4) =183a(5) =203a(6) =802a(7) =1131a(8) =1202a(9) =1618a(10) =2436a(11) =2454a(12) =2810a(13) =2867a(14) =3218a(15) =3983a(16) =4645a(17) =4758a(18) =4939a(19) =5602a(20) =6989a(21) =7569a(22) =8166a(23) =8874a(24) =9023a(25) =9298a(26) =9407a(27) =9691a(28) =9821a(29) =10562