Triangle read by rows: T(n,k) is the number of polygons formed by connecting the vertices of a regular {2*n+1}-gon such that they make k turns around the center point.
A330660
Triangle read by rows: T(n,k) is the number of polygons formed by connecting the vertices of a regular {2*n+1}-gon such that they make k turns around the center point.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =5a(4) =6a(5) =1a(6) =140a(7) =183a(8) =36a(9) =1a(10) =7479a(11) =9982a(12) =2536a(13) =162a(14) =1a(15) =636944a(16) =880738a(17) =267664a(18) =28381a(19) =672a(20) =1a(21) =79661322a(22) =113973276a(23) =39717471a(24) =5860934a(25) =285078a(26) =2718a(27) =1a(28) =13781863080a(29) =20321795499
External references
- oeis: A330660