128000000

Appears in sequences

• a(n)=2*a(n-1), except every tenth time you multiply by 1000/512 instead of by 2.at n=27A051535
• 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=19A079838
• Bhaskara twins: n such that 2*n^2 = X^3 and 2*n^3 = Y^2.at n=19A106318
• Number of (n+2)X(n+2) 0..3 arrays with nondecreasing sum of every three consecutive values in every row and column.at n=1A250860
• Number of (n+2)X(2+2) 0..3 arrays with nondecreasing sum of every three consecutive values in every row and column.at n=1A250862
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with nondecreasing sum of every three consecutive values in every row and column.at n=4A250868
• Numbers k such that the Diophantine equation x^3 + y^3 + 2*z^3 = k has nontrivial primitive parametric solutions.at n=28A338933
• Nonsquare numbers k such that the denominator of the harmonic mean of the divisors of k is larger than 2*k.at n=17A348827