683593

Appears in sequences

• a(n) = Sum_{j=0..i, i=0..n} T(i,j), where T is the array in A026374.at n=16A026384
• a(n) = 5*a(n-1) + 3 with a(0) = 1.at n=8A117617
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >= 2n.at n=35A210367