30780

Appears in sequences

• Longest edge a of smallest (measured by the longest edge) primitive Euler bricks (a, b, c, sqrt(a^2 + b^2), sqrt(b^2 + c^2), sqrt(a^2 + c^2) are integers).at n=36A031173
• a(n) = binomial(2*n, n) mod ((n+1)*(n+2)*(n+3)*(n+4)).at n=16A065346
• Integers i such that 9*i = 25 X i, but 17*i is not 49 X i.at n=30A115811
• a(n) = (9/2)*(n-1)*(n-2)*(n-3).at n=20A134171
• The Wiener index of the Dutch windmill graph D(5,n) (n>=1).at n=35A180579
• Number of strings of numbers x(i=1..n) in 0..7 with sum i*x(i)^4 equal to n*2401.at n=9A184846
• Triangle of coefficients of a sequence of binomial type polynomials.at n=18A195205
• Number of primes <= A214756(n).at n=15A214924
• Number of length n+2 0..3 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.at n=5A250556
• T(n,k)=Number of length n+2 0..k arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.at n=33A250561
• Number of length 6+2 0..n arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.at n=2A250565
• Number of Mersenne number parts in all partitions of n.at n=30A264395
• Number of n-step excursions on the 6-dimensional f.c.c. lattice.at n=4A271651
• Number of nX5 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=6A298218
• Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=4A298220
• Numbers i such that Fibonacci(i) is divisible by i, i+1, and i+2.at n=40A298684