0,5

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.

Sequence in context: A094098 A124137 A025804 this_sequence A029190 A029189 A035432

Adjacent sequences: A042958 A042959 A042960 this_sequence A042962 A042963 A042964

nonn

njas and J. H. Conway (conway(AT)math.princeton.edu)