427336

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-1)/2.at n=29A047179
• Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-2)/2.at n=29A047190
• Concatenation of first 3 digits and last 3 digits of n-th even superperfect number A061652(n).at n=26A138872
• Number of unsensed genus 2 maps with n edges.at n=8A214814
• Triangle read by rows: T(n,k) is the number of unsensed combinatorial maps with n edges and genus k, 0 <= k <= floor(n/2).at n=22A379439