1727880

Appears in sequences

• Number of tree-rooted planar maps with 3 faces and n vertices and no isthmuses.at n=31A006470
• a(n) = (4*n-1)*4*n*(4*n+1).at n=30A069140
• Numbers that can be expressed as the difference of the squares of primes in exactly fifteen distinct ways.at n=21A092011
• G.f. satisfies: 13*A(x) = 12 + 32*x + A(x)^5, starting with [1,4,20].at n=6A120599
• Number of arrangements of n indistinguishable balls in n boxes with the maximum number of balls in any box equal to n-4.at n=28A180294
• Number of (n+2) X 4 binary arrays avoiding patterns 001 and 101 in rows and columns.at n=30A202196