Numbers m such that the concatenation of m with m+4 gives a square.

Terms

a(0) =96a(1) =205a(2) =300a(3) =477a(4) =732a(5) =1920a(6) =3157a(7) =52896a(8) =120085a(9) =427020a(10) =8264460a(11) =88581312a(12) =112000885a(13) =112917765a(14) =143075580a(15) =152863360a(16) =193537077a(17) =233788192a(18) =266755221a(19) =313680096a(20) =370908477a(21) =386568925a(22) =440852992a(23) =442670220