5326685domain: NAppears in sequencesNumber of numbers == 0 (mod 3) in range 2^n to 2^(n+1) with odd number of 1's in binary expansion.at n=24A000773Expansion of 1/((1-x)*(1-3*x)*(1-4*x)).at n=10A016208a(n) = Sum_{2*i+3*j=n, 0<=i<=n, 0<=j<=n} n!/( (2*i)!*(3*j)! ).at n=25A094715