7000000000

Appears in sequences

• a(3n)=10^n. a(3n+1)=4*10^n. a(3n+2)=7*10^n.at n=29A135262
• Expansion of g.f. (1-3*x)/(1-10*x).at n=10A196662
• The decimal representation of the average of the digits of n starts with the digits of n.at n=25A257829