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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