a(n) contains n digits (either '1' or '2') and is divisible by 2^n.

A053312

a(n) contains n digits (either '1' or '2') and is divisible by 2^n.

Terms

    a(0) =2a(1) =12a(2) =112a(3) =2112a(4) =22112a(5) =122112a(6) =2122112a(7) =12122112a(8) =212122112a(9) =1212122112a(10) =11212122112a(11) =111212122112

External references