39123

Appears in sequences

• z-value of the solution (x,y,z) to 3/(2n+1) = 1/x + 1/y + 1/z satisfying 0 < x < y < z, odd x, y, z and having the largest z-value. The x and y components are in A075260 and A075261.at n=29A075262
• Number of length n+2 0..2 arrays with at most one downstep in every n consecutive neighbor pairs.at n=16A255109
• Maximum number of induced copies of the diamond graph K_{1,1,2} in an n-node graph.at n=36A352668
• Triangle read by rows: T(n,m) (0<=m<=n) = number of positive n-digit numbers that have exactly m copies of a specific, previously selected positive base-10 digit among its digits.at n=41A380860
• a(n) = n*(n + 1)*(n^2 + 17*n + 54)/24.at n=27A387204