47641

Appears in sequences

• Strong pseudoprimes to base 25.at n=30A020251
• Strong pseudoprimes to base 46.at n=31A020272
• a(n) = a(n-1) + 2*n^2 with a(1) = 1.at n=40A112524
• The Wiener index of a benzenoid consisting of a linear chain of n hexagons.at n=19A143938
• Sum of distinct residues of all factorials mod 2^n.at n=13A210337
• Euler pseudoprimes to base 5: composite integers such that abs(5^((n - 1)/2)) == 1 mod n.at n=29A262052
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 705", based on the 5-celled von Neumann neighborhood.at n=32A273419
• Base-5 Euler-Jacobi pseudoprimes: odd composite k coprime to 5 such that 5^((k-1)/2) == (5/k) (mod n), where (5/k) is the Jacobi symbol (or Kronecker symbol).at n=22A375914
• Composite numbers k == 1, 9 (mod 10) such that 5^((k-1)/2) == 1 (mod k).at n=21A375915
• Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] (1/3) * (1 / (exp(x) + exp(y) - exp(x+y))^3 - 1).at n=31A382741
• Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = n! * k! * [x^n * y^k] (1/3) * (1 / (exp(x) + exp(y) - exp(x+y))^3 - 1).at n=32A382741
• Numbers k >= 0 such that the interval [A000217(k), A000217(k + 1)] contains at least one Fibonacci number (A000045).at n=44A388653