a(n) contains n digits (either '6' or '7') and is divisible by 2^n.

A053337

a(n) contains n digits (either '6' or '7') and is divisible by 2^n.

Terms

    a(0) =6a(1) =76a(2) =776a(3) =7776a(4) =67776a(5) =667776a(6) =6667776a(7) =66667776a(8) =766667776a(9) =6766667776a(10) =66766667776a(11) =666766667776

External references