87403801

Appears in sequences

• Squares of Lucas numbers.at n=19A001254
• Associated Mersenne numbers.at n=38A001350
• A Fielder sequence: a(n) = a(n-1) + a(n-3) + a(n-4), n >= 4.at n=38A001638
• Alternate Lucas numbers - 2.at n=19A004146
• Number of restricted circular combinations.at n=36A006499
• Squares of odd Lucas numbers.at n=12A014730
• Expansion of (1+x^2)/(1-2*x+x^3).at n=36A014739
• Cyclotomic polynomials Phi_n at x=phi, floored down (where phi = tau = (sqrt(5)+1)/2).at n=37A063703
• Cyclotomic polynomials Phi_n at x=phi, rounded to nearest integer (where phi = tau = (sqrt(5)+1)/2).at n=37A063705
• a(n) = Lucas(4*n+2)-2 = Lucas(2*n+1)^2.at n=9A081071
• a(n) is the number of images of the border correlation function for binary words of length n (cf. link).at n=37A091838
• a(2n) = Lucas(2n+3)^2, a(2n+1) = Lucas(2n+1)^2.at n=16A105671
• a(2n) = Lucas(2n+3)^2, a(2n+1) = Lucas(2n+1)^2.at n=19A105671
• a(n) = Product_{k=1..n} (1 + 4*sin(2*Pi*k/n)^2).at n=19A152152
• Logarithmic derivative of the squares of the Fibonacci numbers (A007598, with offset).at n=18A173661
• a(n) = -4 + 5*Fibonacci(n+1)^2.at n=18A200408
• The simple continued fraction expansion of F(x) := Product_{n >= 0} (1 - x^(4*n+3))/(1 - x^(4*n+1)) when x = 1/2*(3 - sqrt(5)).at n=37A221364
• Incorrect duplicate of A004146.at n=18A275571
• Expansion of x*(1 + 2*x)/((1 - x)*(1 + x)*(1 - x - x^2)).at n=37A301653
• Determinant of the matrix [L(j+k) + d(j,k)]_{1<=j, k<=n}, where L(n) denotes the Lucas number A000032(n), and d(j,k) is 1 or 0 according as j = k or not.at n=17A360278