1,1
A055642(a(n)) = n; a(n) / A130901(n) --> 1.
Table of n, a(n) for n=1..9.
a(1)=#{1,2,4,8}=4;
a(2)=#{16,17,18,19,20,22,24,26,28,30,33,36,39,42,46,50,55,60,66,72,79,86,94}=23.
Sequence in context: A234595 A327367 A303652 * A219932 A266919 A219464
Adjacent sequences: A130887 A130888 A130889 * A130891 A130892 A130893
nonn,base,more
Reinhard Zumkeller, Jun 08 2007
approved
