0,2

Map a binary sequence b=[ b_1,... ] to a binary sequence c=[ c_1,... ] so that C=1/Product((1-x^i)^c_i == 1+Sum b_i*x^i mod 2.

This produces 2 new sequences: d={i:c_i=1} and e=[ 1,e_1,... ] where C=1+Sum e_i*x^i.

Table of n, a(n) for n=0..37.

Sequence in context: A292192 A339499 A295150 * A128217 A288671 A284906

Adjacent sequences: A042953 A042954 A042955 * A042957 A042958 A042959

nonn

N. J. A. Sloane and J. H. Conway

approved