1280734domain: NAppears in sequencesa(n) = (1/24)*(n+1)*(n+6)*(n^3+26*n^2+225*n+636).at n=26A090948G.f.: x^3*(2*x-1) / ((1-x)*(1-x-x^2)*(1-2*x^2)).at n=31A174959Number of length 2+3 0..n arrays with no consecutive four elements summing to more than 2*n.at n=18A241965