Numbers n such that the decimal expansions of both n and n^2 have 2 as smallest digit and 7 as largest digit.
A257123
Numbers n such that the decimal expansions of both n and n^2 have 2 as smallest digit and 7 as largest digit.
Terms
- a(0) =275a(1) =2574a(2) =2725a(3) =2765a(4) =4762a(5) =5725a(6) =6762a(7) =7244a(8) =7262a(9) =23765a(10) =25744a(11) =27244a(12) =27325a(13) =27434a(14) =27465a(15) =27525a(16) =27632a(17) =27665a(18) =47725a(19) =52275a(20) =52376a(21) =52475a(22) =52576a(23) =52675a(24) =57242a(25) =67426a(26) =72266a(27) =72275a(28) =72424a(29) =72426
External references
- oeis: A257123