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..27.

Cf. A041002-A041004.

Sequence in context: A254310 A121174 A050071 * A062203 A095063 A003242

Adjacent sequences: A040999 A041000 A041001 * A041003 A041004 A041005

nonn,easy,eigen

N. J. A. Sloane.

approved