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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..34.
Sequence in context: A072966 A245761 A059759 * A126327 A193286 A098132
Adjacent sequences: A042949 A042950 A042951 * A042953 A042954 A042955
nonn
N. J. A. Sloane and J. H. Conway
approved