52972

Appears in sequences

• Number of sensed genus 1 maps with n edges.at n=5A006386
• a(n) is the sum of distinct sums of all subsets with two or more elements of {1, 2, ..., n}.at n=25A375764
• Triangle read by rows: T(n,k) is the number of sensed combinatorial maps with n edges and genus k, 0 <= k <= floor(n/2).at n=17A379438