6400000000

Appears in sequences

• a(1) = 8; for n > 1, a(n+1) = a(n) * sum of digits of a(n).at n=9A047900
• a(1)=1 and for n>1, a(n) is the smallest multiple of a(n-1) which has no nonzero digit in common with a(n-1).at n=22A079838
• a(n)=Product{k=0..n, 1+9^A010060(k)}/2.at n=14A101655
• Numbers k such that k and k^2 use only the digits 0, 4, 5, 6 and 9.at n=9A136950
• Numbers k such that k and k^2 use only the digits 0, 4, 6 and 9.at n=9A136957