a(n) is the number whose binary representation is the concatenation of n strings of the four digits "1100".

A108020

a(n) is the number whose binary representation is the concatenation of n strings of the four digits "1100".

Terms

    a(0) =0a(1) =12a(2) =204a(3) =3276a(4) =52428a(5) =838860a(6) =13421772a(7) =214748364a(8) =3435973836a(9) =54975581388a(10) =879609302220

External references