1,5

Table of n, a(n) for n=1..32.

G. Lee, F. Ruskey and A. Williams, Hamming distance from irreducible polynomials over GF(2)

The coefficient vectors of the three degree 4 irreducible polynomials are 10011, 11111 and 11001. There is only one polynomial whose Hamming distance is two (or more) from all of them, namely 10101. Thus a(4) = |{10101}| = 1.

Sequence in context: A140253 A018453 A000147 * A227213 A060552 A274868

Adjacent sequences: A128899 A128900 A128901 * A128903 A128904 A128905

nonn

Frank Ruskey, Apr 22 2007

approved