32721

Appears in sequences

• Number of nonequivalent dissections of a polygon into n quadrilaterals by nonintersecting diagonals up to rotation and reflection.at n=9A005036
• Difference between the powers of two and the primes.at n=14A111209
• Let p*q = A006881(n) be the n-th number that is the product of two distinct primes, with p = prime(i), q=prime(j); a(n) = p^j - q^i.at n=28A176885
• Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,0,2,4 for x=0,1,2,3,4.at n=8A196317
• Array read by antidiagonals: T(n,k) = number of nonequivalent dissections of a polygon into n k-gons by nonintersecting diagonals up to rotation and reflection (k >= 3).at n=64A295260
• Number of partitions of n with up to nine distinct kinds of 1.at n=21A320696