Triangle read by rows: T(n,k) is the number of n+2-sided polygons whose points lie on a circle and with the property that one makes k turns on itself, always in the same direction (right or left) while following its edges, 1 <= k <= ceiling(n/2).
A343257
Triangle read by rows: T(n,k) is the number of n+2-sided polygons whose points lie on a circle and with the property that one makes k turns on itself, always in the same direction (right or left) while following its edges, 1 <= k <= ceiling(n/2).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =8a(6) =1a(7) =29a(8) =1a(9) =1a(10) =80a(11) =47a(12) =1a(13) =193a(14) =513a(15) =1a(16) =1a(17) =432a(18) =3338a(19) =244a(20) =1a(21) =925a(22) =16633a(23) =7305a(24) =1a(25) =1a(26) =1928a(27) =70713a(28) =103616a(29) =1186
External references
- oeis: A343257