216566

Appears in sequences

• Convolution of A000108 (Catalan numbers) with A020922.at n=5A045530
• a(n) = K_5(n) = Sum_{k>=0} A090285(5,k)*2^k*binomial(n,k). a(n) = 2*(2*n^5+45*n^4+360*n^3+1215*n^2+1528*n+315)/15.at n=11A090297
• Period length of continued fraction for square root of A095372(n)=1+90*(-1+100^n)/99.at n=6A096486
• a(n) = Sum_{k=0..n} binomial(4*n+1,k) * binomial(3*n-k-1,n-k).at n=5A386939