1,1

A055642(a(n)) = n; a(n) / A130901(n) --> 1.

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: A105747 A099692 A123637 this_sequence A138578 A107765 A145514

Adjacent sequences: A130887 A130888 A130889 this_sequence A130891 A130892 A130893

nonn,base,more

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 08 2007