OFFSET
1,1
EXAMPLE
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.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Reinhard Zumkeller, Jun 08 2007
STATUS
approved