65280

Appears in sequences

• a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3), n > 3, with a(0)=a(1)=a(2)=0, a(3)=1.at n=18A000749
• Icosahedral numbers: a(n) = n*(5*n^2 - 5*n + 2)/2.at n=29A006564
• Theta series of D_6 lattice.at n=31A008428
• Floor-factorial numbers: a(n) = Product_{k=1..n} floor(n/k).at n=17A010786
• Expansion of g.f.: 2*x*(1-x)/((1-2*x)*(1-2*x^2)).at n=16A014236
• a(n) = 4^n - 2^n.at n=8A020522
• a(n) = 2^n - n^2.at n=16A024012
• Number of aperiodic binary strings of length n; also number of binary sequences with primitive period n.at n=16A027375
• Solutions x of 2*uphi(x)=x, where uphi is the unitary phi function (A047994).at n=5A030163
• Number of reversible strings with n beads of 2 colors. If more than 1 bead, not palindromic.at n=16A032085
• Nextprime(4^n)-nextprime(2^n).at n=8A037130
• Row sums of triangle T(m,n) = number of solutions to 1 <= a(1) < a(2) < ... < a(m) <= n, where gcd(a(1), a(2), ..., a(m), n) = 1, in A020921.at n=15A038199
• Number of elements of GF(2^n) with trace 1 and subtrace 0.at n=18A038520
• Nonnegative numbers of the form x^y - y^x, for x,y > 1.at n=26A045575
• Number of 2n-bead balanced binary necklaces which are equivalent to their reversed complement, but not equivalent to their reverse and complement.at n=17A045678
• Number of 2n-bead balanced binary necklaces of fundamental period 2n which are equivalent to their reversed complement, but are not equivalent to their reverse and complement.at n=17A045687
• a(n) = n*(n-1)^2*(n-2).at n=15A047928
• Order of n-th stable homotopy group of spheres.at n=30A048648
• Sum of divisors of those numbers n such that n and n+1 have the same sum of divisors.at n=16A053215
• Sum of divisors of k such that k and k+1 have the same number and sum of divisors.at n=5A054005