505050

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 2, 3, 5 and 7.at n=50A136889
• Numbers k such that k and k^2 use only the digits 0, 2, 5 and 7.at n=23A136915
• Numbers k such that k and k^2 use only the digits 0, 2, 5, 7 and 8.at n=50A136916
• List of numbers k whose consecutive digits increase or decrease by d-1, where d is the number of digits in k.at n=110A292439
• Indices k of records of low value in the ratios A348173(k)/k.at n=8A348174