16384908domain: NAppears in sequencesExpansion of 1/(1 - x^3/(1-x)^7).at n=18A369806a(n) = Sum_{k=0..floor(n/7)} binomial(n-4*k,3*k).at n=41A370722Expansion of (1 + x)/(1 - x^3*(1 + x)^4).at n=30A375320