39675

Appears in sequences

• Number of spanning trees in K_3 X P_n.at n=3A003690
• Number of perfect matchings (or domino tilings) in K_4 X P_n.at n=6A003769
• Area of n-th triple of squares around a triangle.at n=7A005386
• Composite numbers k+1 such that k*phi(k+1) is a perfect square.at n=30A069068
• Odd numbers k such that A166100((k-1)/2)/k is not an integer.at n=31A166102
• Number A(n,k) of spanning trees in C_k X P_n; square array A(n,k), n>=1, k>=1, read by antidiagonals.at n=18A173958
• Number of n X 5 nonnegative integer arrays with each row and column increasing from zero by 0 or 1.at n=7A202753
• T(n,k)=Number of nXk nonnegative integer arrays with each row and column increasing from zero by 0 or 1.at n=70A202756
• 3*h^2, where h is an odd integer not divisible by 3.at n=38A229852
• Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) = sqrt( Product_{a=1..n-1} Product_{b=1..k-1} (4*sin(a*Pi/n)^2 + 4*cos(b*Pi/k)^2) ).at n=47A340561
• Numbers k such that k divides A306069(k).at n=6A344731