4168755811

Appears in sequences

• a(n) = 4*a(n-1) - a(n-2), with a(0) = 1, a(1) = 1.at n=18A001835
• a(n) = 4*a(n-2) - a(n-4) for n > 1, a(n) = n for n = 0, 1.at n=35A002530
• a(n) = 4*a(n-1) - a(n-2) with a(1) = 1, a(2) = 3.at n=17A079935
• Number of Khalimsky-continuous functions with a three-point codomain.at n=32A131887
• a(n) gives y-values solving the Diophantine equation 2*x^2 + (x-1)^2 = y^2 for positive x.at n=8A189356
• a(n) = numerator(r(n)) where r(n) = (((1/2)*(sqrt(3) + 1))^n - ((1/2)*(sqrt(3) - 1))^n * cos(Pi*n))/sqrt(3).at n=35A305491
• Diagonals of a Euclidian solid such that there exists a Pythagorean quadruple d^2=a^2+b^2+c^2 that is more cube-like than any prior value of d.at n=24A375098