Number of unrooted planar 3-constellations with n triangles.
A090372
Number of unrooted planar 3-constellations with n triangles.
Terms
- a(0) =1a(1) =6a(2) =22a(3) =174a(4) =1479a(5) =16808a(6) =201834a(7) =2631594a(8) =35965555a(9) =512062566a(10) =7528425420a(11) =113708935808
External references
- oeis: A090372