206221

Properties

Appears in sequences

• [ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 1 mod 4}.at n=26A024389
• Primes p such that p*(p-2) divides 3^(p-1)-1.at n=18A081764
• Number of n X 1 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it, modulo 4.at n=14A239812
• Prime numbersat n=18485