26343750domain: NAppears in sequencesExpansion of bracket function.at n=24A000750Row sums of Riordan array ((1-3x+x^2)/(1-4x+3x^2), x(1-2x)/(1-4x+3x^2)).at n=14A147748Number of paths of length n starting at initial node of the path graph P_9.at n=28A178381a(n) = Sum_{k>=0} (-1)^k*binomial(n,5*k+4).at n=28A289389