2435423

Appears in sequences

• An infinite coprime sequence defined by recursion.at n=6A002715
• a(n+1) - 3*a(n) + a(n-1) = (2/3)(1+w^(n+1)+w^(2n+2)), where w = exp(2 Pi I / 3).at n=16A071618
• Odd composite n such that n divides Fibonacci(n) + 1.at n=25A094395
• Composite numbers k that divide both Fibonacci(k+1) and Fibonacci(k) + 1.at n=20A094411
• Expansion of x*(1+3*x+2*x^2)/((1+x+x^2)*(1-x-x^2)).at n=31A100886
• Expansion of (1-x)*(2*x^2+2*x+1) / ((x^2-x-1)*(x^2+x+1)).at n=31A111734
• a(n) = 3*a(n-1) + 5*a(n-2) + a(n-3).at n=10A120775
• a(n) = floor(Lucas(n+1)/2), Lucas(n) = A000032(n).at n=31A173714
• Partial sums of odd Fibonacci numbers (A014437).at n=20A174542
• a(n) = numerator of Sum_{i=1..n} binomial(2n-i-1,i-1)/i.at n=15A175385
• Half the number of n X 2 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=15A185828
• a(n) = numerator of B(0,n) where B(n,n) = 0, B(n-1,n) = 1/n, and B(m,n) = B(m-1,n+1) - B(m-1,n).at n=31A189731
• Frobenius pseudoprimes == 2,3 (mod 5) with respect to Fibonacci polynomial x^2 - x - 1.at n=17A212423
• Expansion of (1-x+x^3)/(1-x^2+2*x^3-x^4).at n=32A226447
• The edge independence number of the Lucas cube Lambda(n).at n=32A245968
• Indices of triangular numbers (A000217) that are also centered pentagonal numbers (A005891).at n=10A254626
• Smallest nonnegative integer not expressible by the addition and subtraction of fewer than n Lucas numbers.at n=11A364754