819200

Appears in sequences

• Numbers of form 5^i*8^j, with i, j >= 0.at n=35A025623
• 17-almost primes (generalization of semiprimes).at n=11A069278
• a(n) is the number of occurrences of 7's in the palindromic compositions of 2*n-1, or also, the number of occurrences of 8's in the palindromic compositions of 2*n.at n=15A079861
• a(n) = A003474(n)/n.at n=15A094678
• Smallest number beginning with 8 and having exactly n prime divisors counted with multiplicity.at n=16A106428
• a(n) = n^2*8^n.at n=5A128787
• a(n) = (2*n-8)^2 * 2^(n-3).at n=14A135466
• Number of binary strings of length n with equal numbers of 0001 and 1000 substrings.at n=20A164161
• Second arithmetic derivative of squares of prime powers: a(n)=A068346(A056798(n)).at n=44A192084
• Define the array k(n,x) = number of m such that tau(gcd(n,m)) is x where m runs from 1 to n. Also define h(n,x) = Sum_{d|n : tau(d) = x} d. The sequence contains numbers n such that k(n,x)*x = h(n,x) has at least one solution x.at n=34A197099
• a(n+6) = 6*a(n+4) - 12*a(n+2) + 8*a(n), a(0)..a(5) = 8,0,9,0,8,0.at n=28A243456
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 229", based on the 5-celled von Neumann neighborhood.at n=20A279995
• a(n) is the denominator of 6 * Sum_{k=0..n} ((k+1)/(n-k+1)^2) * (Catalan(k)/(2^(2*k+1)))^2.at n=4A280723
• Chebyshev coefficients of density of states of square lattice.at n=6A288454