87841

Appears in sequences

• Golden rectangle numbers: F(n) * F(n+1), where F(n) = A000045(n) (Fibonacci numbers).at n=13A001654
• a(n) = a(n-1) + a(n-3) + a(n-4), a(0) = a(1) = a(2) = 1, a(3) = 2.at n=25A006498
• a(n) = a(n-1) + a(n-3) + a(n-4), starting with a(0..3) = 1, 2, 2, 3.at n=24A070550
• a(n) = Sum_{i = 0..floor(n/2)} (-1)^(i + floor(n/2)) F(2*i + e), where F = A000045 (Fibonacci numbers) and e = (1-(-1)^n)/2.at n=26A074677
• Antidiagonal sums of triangle A035317.at n=24A080239
• a(n) = (Lucas(4*n+3) + 1)/5, or Fibonacci(2*n+1)*Fibonacci(2*n+2), or A081015(n)/5.at n=6A081016
• Numbers n such that n^2= (1/5)*(n+floor(sqrt(5)*n*floor(sqrt(5)*n))).at n=8A081097
• a(2*n) = F(3*n)*F(3*n+2), a(2*n+1) = F(3*n+1)*F(3*n+2), where F = A000045.at n=9A114703
• Ordered sequence of Fibonomial coefficients.at n=43A144712
• A product of consecutive doubled Fibonacci numbers.at n=12A166536
• Ordered Fibonomial coefficients (A144712) which are not Fibonacci numbers (A000045).at n=19A171159
• Lower Wythoff values for sequence A185615(n).at n=31A185616
• Denominators a(n) of Pythagorean approximations b(n)/a(n) to 1/2.at n=12A195547
• Numerators b(n) of Pythagorean approximations b(n)/a(n) to 2.at n=3A195615
• Denominators in an expansion of 3 - sqrt(5) as a sum of fractions +-1/d.at n=17A255353
• a(n) = a(n-1) + a(n-3) + a(n-4), where a(0) = 2, a(1) = 1, a(2) = 0, a(3) = 2.at n=25A295688
• Number of 4-linear trees on n nodes.at n=18A338708
• E.g.f. A(x) satisfies A(x) = exp(x + x^5*A''''(x)).at n=6A386503