Minimal size of binary code of length n such that every vector is within distance 1 of at least 2 codewords.

A004045

Minimal size of binary code of length n such that every vector is within distance 1 of at least 2 codewords.

Terms

    a(0) =2a(1) =3a(2) =4a(3) =8a(4) =12a(5) =20a(6) =32

External references