476928

Appears in sequences

• Number of permutations of 1..n in which every pair of adjacent numbers are relatively prime.at n=12A076220
• Number of ways to arrange the numbers 1..n in a circle (up to direction) such that every two adjacent numbers are relatively prime.at n=12A086595
• Number of permutations of (the positive integers <= n and coprime to n), where each element of the permutations is coprime to its adjacent elements.at n=12A109813
• a(n) = A000010(A006862(n)).at n=7A171989
• Number of 0..n arrays x(0..4) of 5 elements with each no smaller than the sum of its previous elements modulo (n+1).at n=21A200254
• Triangle read by rows T(n,k): number of undirected cycles of length k in the complete tripartite graph K_{n,n,n} (n = 1...; k = 3..3n).at n=19A296546
• Coefficients in expansion of (E_4^3/E_6^2)^(1/2).at n=2A300055