38311

Appears in sequences

• Strong pseudoprimes to base 12.at n=25A020238
• Strong pseudoprimes to base 38.at n=25A020264
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 31 ones.at n=13A031799
• Numbers k such that j(k)*phi(k) = sigma(phi(k)), j(k) = A033831(k).at n=20A033856
• a(n) = (1/24)*(n+1)*(n+3)*(n^2+22*n+88).at n=26A090950
• a(n) = 2^n*Product_{k=1..floor((n-1)/2)} (1 + 2*cos(k*Pi/n)^2 + 4*cos(k*Pi/n)^4).at n=14A152090
• a(n) = Product_{k=1..floor((n-1)/2)} (1 + 4*sin(k*Pi/n)^2 + 16*sin(k*Pi/n)^4).at n=14A152142
• a(n) = ceiling(n^3*(Pi/2)).at n=28A248198
• Number of non-equivalent ways to place 2 non-attacking kings on an n X n board.at n=27A279111