268468224

Appears in sequences

• Numbers n such that n + product of prime factors of n = (n+1) + product of prime factors of (n+1).at n=8A075655
• Numbers k such that A007947(k) = A007947(m+1) and A007947(m) = A007947(k+1), where k > m.at n=15A088966
• Number of binary pattern classes in the (2,n)-rectangular grid; two patterns are in same class if one of them can be obtained by reflection or rotation of the other one.at n=14A132390
• Number of -1..1 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two or four distinct values for every i,j,k<=n.at n=26A211525
• Number of binary pattern classes in the (2,n)-rectangular grid: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other.at n=15A225826
• a(n) = 4^n + 2^(n+1).at n=14A242985
• Number of monomials in c(n) where c(1) = x, c(2) = y, c(n+2) = c(n+1) + c(n)^2.at n=31A290075
• Number of solutions of y^2 + y = x^3 + x where x and y are in GF(2^n).at n=27A362374
• Ordered long legs of the Pythagorean triangles defined by a = 2^(4n) + 2^(2n+1), b = 2^(4n) - 2^(4n-2) - 2^(2n) - 1, c = 2^(4n) + 2^(4n-2) + 2^(2n) + 1.at n=6A381006