Numbers whose square is the concatenation of two numbers k and k-9.
A115447
Numbers whose square is the concatenation of two numbers k and k-9.
Terms
- a(0) =71a(1) =7235a(2) =9701a(3) =798981a(4) =997001a(5) =35324118a(6) =64675883a(7) =99970001a(8) =3297392379a(9) =6702607622a(10) =7890726434a(11) =8812181189a(12) =9999700001a(13) =897807218979a(14) =917811219179a(15) =979998999801a(16) =999997000001
External references
- oeis: A115447