Triangle read by rows: T(n,g) = number of general immersions of a circle with n crossings in a surface of arbitrary genus g (the circle is not oriented, the surface is not oriented).
A260914
Triangle read by rows: T(n,g) = number of general immersions of a circle with n crossings in a surface of arbitrary genus g (the circle is not oriented, the surface is not oriented).
Terms
- a(0) =1a(1) =2a(2) =1a(3) =6a(4) =5a(5) =1a(6) =19a(7) =45a(8) =22a(9) =0a(10) =76a(11) =335a(12) =427a(13) =56a(14) =0a(15) =376a(16) =3101a(17) =7557a(18) =3681a(19) =0a(20) =0a(21) =2194a(22) =29415a(23) =124919a(24) =139438a(25) =17398a(26) =0a(27) =0a(28) =14614a(29) =295859
External references
- oeis: A260914