26080

Appears in sequences

• Surround numbers of an n X 2 rectangle when n is even.at n=8A061524
• Fibonacci(p-J(p,5)) mod p^2, where p is the n-th prime and J is the Jacobi symbol.at n=37A113650
• Numbers k such that 5^k mod k = 5^k mod k^2.at n=36A125775
• Number of permutations of floor(i*7/3), i=0..n-1, with all sums of 3 adjacent terms unique.at n=7A152321
• Number of unlabeled connected loopless multigraphs with n edges rooted at one unoriented edge.at n=8A339038
• a(n) = Sum_{k=1..n} mu(k) * (floor(n/k)^4 - floor((n-1)/k)^4).at n=19A344597