520192

Appears in sequences

• a(n) = 4^(n-1)*(2^n-1).at n=7A016152
• Stirling2 triangle with scaled diagonals (powers of 4).at n=29A075499
• Triangle T(k,n) by rows: n! * A075499(k,n).at n=29A099394
• Let S(n)=Sigma(n)/2. Numbers n such that S(S(n))=n, 1/2-Sociable number of order 1 or 2.at n=27A113791
• Numbers with 26 divisors.at n=29A137489
• a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 8.at n=7A160897
• Conjectured list of smallest members of fully k-sociable cycles of order r.at n=26A183026
• Expansion of (1+16*x)/((1+4*x)*(1-8*x)).at n=6A271494
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 910", based on the 5-celled von Neumann neighborhood.at n=18A290670
• a(n) = 2^n - 2^floor(2n/3).at n=19A291779
• Lesser member of Carmichael's variant of amicable pair: numbers k < m such that s(k) = m and s(m) = k, where s(k) = A371418(k).at n=12A371419