136137

Appears in sequences

• Number of preferential arrangements of n labeled elements when at least k=8 elements per rank are required.at n=18A245793
• a(n) = Sum_{k=0..floor(n/3)} binomial(4*n-2*k,n-3*k).at n=6A371755
• Odd numbers k > 1 such that gcd(5,k) = 1 and 5^((k-1)/2) == -(5/k) (mod k), where (5/k) is the Jacobi symbol (or Kronecker symbol); Euler pseudoprimes to base 5 (A262052) that are not Euler-Jacobi pseudoprimes to base 5 (A375914).at n=12A375816