134070

Appears in sequences

• Coefficient of x^4 in expansion of (1+x+x^2)^n.at n=39A005712
• Integers y such that for some integer x we have uphi(x) = uphi(y) = x-y, where uphi(n) = A047994(n) is the unitary totient function: If n = Product p_i^e_i, uphi(n) = Product (p_i^e_i - 1).at n=19A067741
• Sums of squares of primitive roots of primes.at n=26A089453
• a(n) = Trinomial(2*n+1, 4) = (1/6)*n*(2*n + 1)*(2*n^2 + 9*n + 1), n >= 0.at n=20A302709