6888960

Appears in sequences

• a(0)=1, a(1)=8, a(n)=16*a(n-1)-8*a(n-2) for n>1 .at n=6A165231
• a(n) = 2^n*binomial(4*n, n)/(3*n+1).at n=7A217360
• a(n) = n*(n + 1)*(n + 2)*(n + 3)*(n + 4)*(n^2 - n + 6)/720.at n=22A256861