50551

Properties

Appears in sequences

• Primes which can be expressed as concatenation of powers of 5 and 0's.at n=26A066596
• Primes having only {0, 1, 5} as digits.at n=21A199325
• Number of (w,x,y,z) with all terms in {1,...,n} and 2*w*x>3*y*z.at n=19A211922
• Primes of the form 2*n^2 + 90*n + 43.at n=13A217621
• G.f. satisfies: A(x) = (1+x+x^2) * A(x^2)^2.at n=38A237651
• Artiads (A001583) congruent to 1 mod 50 and for which 5 is a quintic residue.at n=8A271210
• a(n) is the number of equivalence classes of simple, open polygonal chains consisting of two segments and with all three vertices on the lattice points of an n X n grid.at n=17A272053
• The number of regions formed inside a triangle with leg lengths equal to the Pythagorean triples by straight line segments mutually connecting all vertices and all points that divide the sides into unit length parts.at n=4A332978
• Prime numbersat n=5186