498226

Appears in sequences

• a(n) = K_4(n) = Sum_{k>=0} A090285(4,k)*2^k*binomial(n,k). a(n) = 2*(n^4+14*n^3+62*n^2+91*n+21)/3.at n=26A090296
• a(n) = (n*3^(n+1)+((5*3^(n+1)+(-1)^(n))/4))/4.at n=10A191008