63882

Appears in sequences

• Number of (w,x,y,z) with all terms in {0,...,n}, w and x odd, y even.at n=26A212762
• Numbers k such that k and uphi(k) have the same set of prime divisors, where uphi is the unitary totient function (A047994).at n=30A329859
• a(n) = T(n, 3), where T(n, k) = Sum_{i=0..n} i^k * binomial(n, i) * (1/2)^(n-k).at n=39A366151