a(n) is the number of rooted 2n-face triangulations in an orientable surface of genus 1.

A269473

a(n) is the number of rooted 2n-face triangulations in an orientable surface of genus 1.

Terms

    a(0) =1a(1) =28a(2) =664a(3) =14912a(4) =326496a(5) =7048192a(6) =150820608a(7) =3208396800a(8) =67968706048

External references