A042954 The sequence d when b=[ 1,1,0,1,1,.. ].

1, 3, 4, 6, 7, 8, 10, 11, 12, 13, 15, 20, 21, 26, 29, 30, 32, 33, 35, 37, 39, 40, 41, 43, 44, 49, 55, 58, 59, 64, 65, 67, 70, 71, 73, 74, 78, 80

Offset

0,2

Comments

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.

Links

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

Crossrefs

Sequence in context: A007401 A275481 A234349 * A361457 A247987 A062975

Adjacent sequences: A042951 A042952 A042953 * A042955 A042956 A042957

Keyword

nonn

Author

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

Status

approved