A343369 - cp's OEIS frontend

A343369 Triangle read by rows: T(n,k) is the number of polygons formed by connecting the vertices of a regular 2n-gon such that the winding number around the center is k and with no side passing through the center.

n	a(n)
1	0
2	0
3	1
4	6
5	10
6	0
7	296
8	391
9	56
10	1
11	21580
12	28298
13	6132
14	246
15	0
16	2317884
17	3137098
18	859536
19	70389
20	1012
21	1
22	349281380
23	490054052
24	158307216
25	19756138
26	711692
27	4082
28	0
29	70651004192
30	102443715659
31	37521267472
32	6221752657
33	390266848
34	6782563
35	16368
36	1

[0, 0, 1, 6, 10, 0, 296, 391, 56, 1, 21580, 28298, 6132, 246, 0, 2317884, 3137098, 859536, 70389, 1012, 1, 349281380, 490054052, 158307216, 19756138, 711692, 4082, 0, 70651004192, 102443715659, 37521267472, 6221752657, 390266848, 6782563, 16368, 1]

cp's OEIS Frontend

A343369 Triangle read by rows: T(n,k) is the number of polygons formed by connecting the vertices of a regular 2n-gon such that the winding number around the center is k and with no side passing through the center.

Table of values

List of values