The number of regions inside a pentagram formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.
A331906
The number of regions inside a pentagram formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.
Terms
- a(0) =40a(1) =1100a(2) =7330a(3) =25540a(4) =65930a(5) =136200a(6) =263010a(7) =458410a(8) =740550a(9) =1142740a(10) =1681640a(11) =2400970a(12) =3338850a(13) =4495510a(14) =5962220a(15) =7736150a(16) =9924580a(17) =12442880a(18) =15527670a(19) =19132140a(20) =23301600a(21) =28070620a(22) =33585800a(23) =39919140a(24) =47157510a(25) =55209750a(26) =64185300a(27) =74311940a(28) =85731780a(29) =98167130
External references
- oeis: A331906