190008

Appears in sequences

• Coefficient of x^5 in expansion of (1 + x + x^2)^n.at n=25A000574
• a(n) = binomial(2*n, n) mod ((n+1)*(n+2)*(n+3)*(n+4)).at n=24A065346
• a(n) = n*(n+1)*(n+2)*(n+3)/3.at n=26A162668
• Coefficient of x^2 in the reduction by (x^3 -> x + 1) of the polynomial F(n+1)*x^n, where F(n)=A000045 (Fibonacci sequence).at n=13A192913
• Composite k for which lcm(k, phi(k)) + lcm(k, tau(k)) = lcm(k, sigma(k)).at n=7A328651