A356119 - cp's OEIS frontend

A356119 Irregular table read by rows: T(n,k) is the number of k-sided polygons formed, for k>=3, in an equilateral triangle when straight line segments connect the three corner vertices to the points dividing the sides into n equal parts.

n	a(n)
1	1
2	6
3	12
4	3
5	3
6	1
7	24
8	6
9	36
10	9
11	9
12	7
13	48
14	24
15	6
16	72
17	21
18	15
19	19
20	84
21	48
22	12
23	6
24	108
25	51
26	33
27	25
28	132
29	78
30	18
31	18
32	168
33	69
34	51
35	43
36	180
37	120
38	48
39	18
40	216
41	135
42	57
43	61
44	252
45	156
46	66
47	36
48	294
49	159
50	105
51	67
52	312
53	234
54	84
55	48
56	372
57	225
58	117
59	103
60	408
61	264
62	138
63	60
64	456
65	291
66	159
67	121
68	486
69	372
70	138
71	84

[1, 6, 12, 3, 3, 1, 24, 6, 36, 9, 9, 7, 48, 24, 6, 72, 21, 15, 19, 84, 48, 12, 6, 108, 51, 33, 25, 132, 78, 18, 18, 168, 69, 51, 43, 180, 120, 48, 18, 216, 135, 57, 61, 252, 156, 66, 36, 294, 159, 105, 67, 312, 234, 84, 48, 372, 225, 117, 103, 408, 264, 138, 60, 456, 291, 159, 121, 486, 372, 138, 84]

cp's OEIS Frontend

A356119 Irregular table read by rows: T(n,k) is the number of k-sided polygons formed, for k>=3, in an equilateral triangle when straight line segments connect the three corner vertices to the points dividing the sides into n equal parts.

Table of values

List of values

n	a(n)
1	1
2	6
3	12
4	3
5	3
6	1
7	24
8	6
9	36
10	9
11	9
12	7
13	48
14	24
15	6
16	72
17	21
18	15
19	19
20	84
21	48
22	12
23	6
24	108
25	51
26	33
27	25
28	132
29	78
30	18
31	18
32	168
33	69
34	51
35	43
36	180
37	120
38	48
39	18
40	216
41	135
42	57
43	61
44	252
45	156
46	66
47	36
48	294
49	159
50	105
51	67
52	312
53	234
54	84
55	48
56	372
57	225
58	117
59	103
60	408
61	264
62	138
63	60
64	456
65	291
66	159
67	121
68	486
69	372
70	138
71	84

n	a(n)
1	1
2	6
3	12
4	3
5	3
6	1
7	24
8	6
9	36
10	9
11	9
12	7
13	48
14	24
15	6
16	72
17	21
18	15
19	19
20	84
21	48
22	12
23	6
24	108
25	51
26	33
27	25
28	132
29	78
30	18
31	18
32	168
33	69
34	51
35	43
36	180
37	120
38	48
39	18
40	216
41	135
42	57
43	61
44	252
45	156
46	66
47	36
48	294
49	159
50	105
51	67
52	312
53	234
54	84
55	48
56	372
57	225
58	117
59	103
60	408
61	264
62	138
63	60
64	456
65	291
66	159
67	121
68	486
69	372
70	138
71	84

n	a(n)
1	1
2	6
3	12
4	3
5	3
6	1
7	24
8	6
9	36
10	9
11	9
12	7
13	48
14	24
15	6
16	72
17	21
18	15
19	19
20	84
21	48
22	12
23	6
24	108
25	51
26	33
27	25
28	132
29	78
30	18
31	18
32	168
33	69
34	51
35	43
36	180
37	120
38	48
39	18
40	216
41	135
42	57
43	61
44	252
45	156
46	66
47	36
48	294
49	159
50	105
51	67
52	312
53	234
54	84
55	48
56	372
57	225
58	117
59	103
60	408
61	264
62	138
63	60
64	456
65	291
66	159
67	121
68	486
69	372
70	138
71	84