17454580

Appears in sequences

• Triangle read by rows giving number of ways to glue sides of a 2n-gon so as to produce a surface of genus g.at n=28A035309
• Triangle read by rows: T(n,f) is the number of rooted maps with n edges and f faces on an orientable surface of genus 3.at n=6A269923
• Triangle read by rows: T(n,f) is the number of rooted maps with n edges and f faces on an orientable surface of genus 3.at n=9A269923
• Triangle read by rows: T(n,g) is the number of rooted maps with n edges and 4 faces on an orientable surface of genus g.at n=15A270408
• a(n) is the number of rooted maps with n edges and one face on an orientable surface of genus 3.at n=3A288075
• a(n) is the number of rooted maps with n edges and 4 faces on an orientable surface of genus 3.at n=0A288078
• Numbers m such that (1/m) * Sum_{k=1..m} phi(k)/k is closer to 6/Pi^2 than it is for any number smaller than m, where phi is the Euler totient function (A000010).at n=40A385561