18879

Appears in sequences

• Number of ordered quadruples of integers from [ 1,n ] with no common factors between pairs.at n=43A015636
• Number of homeomorphically irreducible general graphs on 3 labeled node and with n edges.at n=16A060578
• Numbers that are sums of 2 or more consecutive squares in more than 1 way.at n=24A062681
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+881)^2 = y^2.at n=7A130014
• Numbers that are the sum of one or more consecutive squares in more than one way.at n=30A130052
• Numbers of the form 110 + p^2. (where p is a prime).at n=32A138693
• Difference between the cubes and 2*tetrahedral numbers; A000578(n) - 2*A000292(n).at n=31A146298
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0010 pattern in any orientation.at n=10A146398
• Positive integers m such that pi(m^2) = pi(j^2) + pi(k^2) for no 0 < j <= k < m.at n=50A262408
• Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.at n=5A304469
• Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.at n=4A304470
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.at n=49A304472
• T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.at n=50A304472
• Numbers that can be written as the sum of four or more consecutive squares in more than one way.at n=15A307937
• Triangle read by rows: number of Boolean functions in n variables, of algebraic degree d, with the property that at least one of their discrete derivatives has degree strictly smaller than d-1 (d-1 is maximum possible degree).at n=16A316554