A176894 Increase each digit in the binary representation of n by 2.

2, 3, 32, 33, 322, 323, 332, 333, 3222, 3223, 3232, 3233, 3322, 3323, 3332, 3333, 32222, 32223, 32232, 32233, 32322, 32323, 32332, 32333, 33222, 33223, 33232, 33233, 33322, 33323, 33332, 33333, 322222, 322223, 322232, 322233, 322322

Offset

0,1

Comments

Or: add two times the repunit of matching length to A007088(n).

Links

Table of n, a(n) for n=0..36.

Formula

a(n) = A007088(n)+A002276(A070939(n)).

Example

0+2, 1+2, 10+22, 11+22, 100+222, 101+222, 110+222, 111+222, 1000+2222, 1001+2222,...

Mathematica

Table[Sum[Table[((Reverse[IntegerDigits[n, 2]]) /. 0 -> 2) /. 1 -> 3, {n, 0, 50}][[n]][[m]]*10^( m - 1), {m, 1, Length[Table[((Reverse[IntegerDigits[n, 2]]) /. 0 -> 2) /. 1 -> 3, {n, 0, 50}][[n]]]}], {n, 1, 51}]
Table[FromDigits[2 + IntegerDigits[n, 2]], {n, 0, 100}]

Crossrefs

Sequence in context: A004843 A173353 A032815 * A041053 A212763 A103108

Adjacent sequences: A176891 A176892 A176893 * A176895 A176896 A176897

Keyword

nonn,base,easy

Author

Roger L. Bagula, Apr 28 2010

Status

approved