77500

Appears in sequences

• a(n) = floor( n(n+1)(n+2)(n+3)(n+4) / (n+(n+1)+(n+2)+(n+3)+(n+4)) ).at n=23A032768
• a(n) = Sum_{k=1..n, gcd(n,k) = 1} k^3.at n=24A053819
• Number of primitive (aperiodic) palindromes using a maximum of five different symbols.at n=13A056461
• Triangular array: the fusion of polynomial sequences P and Q given by p(n,x)=(x+2)^n and q(n,x)=(x+2)^n.at n=32A193726
• Mirror of the triangle A193726.at n=31A193727
• Primitive integer length of the side of an origin-centered square that contains inside its boundary a point with integer coordinates that is an integer distance from three of the four corners.at n=30A215365
• Number of non-palindromic n-tuples of 5 distinct elements.at n=6A240437
• a(n) = 4*n*(21*n - 26).at n=31A263229
• p-INVERT of the triangular numbers (A000217), where p(S) = 1 - S - S^2.at n=8A289797
• Larger of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = psi(n) - n and psi(n) = A001615(n) is the Dedekind psi function.at n=26A323330
• Number of integer partitions of n where the parts do not have the same median as the distinct parts.at n=45A360244