Triangle read by rows: T(n,g) = number of general immersions of a circle with n crossings in a surface of arbitrary genus g, in the case that the circle is oriented and the surface is oriented.
A260285
Triangle read by rows: T(n,g) = number of general immersions of a circle with n crossings in a surface of arbitrary genus g, in the case that the circle is oriented and the surface is oriented.
Terms
- a(0) =1a(1) =3a(2) =1a(3) =9a(4) =11a(5) =2a(6) =37a(7) =113a(8) =68a(9) =0a(10) =182a(11) =1102a(12) =1528a(13) =216a(14) =0a(15) =1143a(16) =11114a(17) =28947a(18) =14336a(19) =0a(20) =0a(21) =7553a(22) =112846a(23) =491767a(24) =554096a(25) =69264a(26) =0a(27) =0a(28) =54559a(29) =1160532
External references
- oeis: A260285