20396

Appears in sequences

• Numbers n such that 183*2^n-1 is prime.at n=21A050843
• McKay-Thompson series of class 38A for Monster.at n=49A058657
• A Wallis pair (x,y) satisfies sigma(x^2) = sigma(y^2); sequence gives y's for indecomposable Wallis pairs with x < y (ordered by values of x).at n=33A075769
• Number of tatami tilings of a 6 X n grid (with monomers allowed).at n=13A192092
• Number of 2 X 2 matrices having all elements in {-n,...n} and determinant 4.at n=34A209988