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 1.
A269921
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 1.
Terms
- a(0) =1a(1) =10a(2) =10a(3) =70a(4) =167a(5) =70a(6) =420a(7) =1720a(8) =1720a(9) =420a(10) =2310a(11) =14065a(12) =24164a(13) =14065a(14) =2310a(15) =12012a(16) =100156a(17) =256116a(18) =256116a(19) =100156a(20) =12012a(21) =60060a(22) =649950a(23) =2278660a(24) =3392843a(25) =2278660a(26) =649950a(27) =60060a(28) =291720a(29) =3944928
External references
- oeis: A269921