28268

Appears in sequences

• Sum of the lengths of the longest increasing subsequence over all 321-avoiding permutations of [n].at n=8A132889
• prime(n)*( prime(n)-n ).at n=42A161522
• a(n) is the number whose binary representation is the concatenation of the divisors of n written in base 2.at n=11A182622
• Number of n X 4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,4,0 for x=0,1,2,3,4.at n=9A196918
• a(n) = Sum_{k=1..n} Stirling2(n,k) * (k-1)! * phi(k), where phi = A000010.at n=6A330444