A057145 - cp's OEIS frontend

A057145 Square array of polygonal numbers T(n,k) = ((n-2)k^2 - (n-4)k)/2, n >= 2, k >= 1, read by antidiagonals upwards.

n	a(n)
2	1
3	1
4	2
5	1
6	3
7	3
8	1
9	4
10	6
11	4
12	1
13	5
14	9
15	10
16	5
17	1
18	6
19	12
20	16
21	15
22	6
23	1
24	7
25	15
26	22
27	25
28	21
29	7
30	1
31	8
32	18
33	28
34	35
35	36
36	28
37	8
38	1
39	9
40	21
41	34
42	45
43	51
44	49
45	36
46	9
47	1
48	10
49	24
50	40
51	55
52	66
53	70
54	64
55	45
56	10
57	1
58	11
59	27
60	46
61	65
62	81
63	91
64	92
65	81
66	55
67	11
68	1
69	12
70	30
71	52
72	75
73	96
74	112

[1, 1, 2, 1, 3, 3, 1, 4, 6, 4, 1, 5, 9, 10, 5, 1, 6, 12, 16, 15, 6, 1, 7, 15, 22, 25, 21, 7, 1, 8, 18, 28, 35, 36, 28, 8, 1, 9, 21, 34, 45, 51, 49, 36, 9, 1, 10, 24, 40, 55, 66, 70, 64, 45, 10, 1, 11, 27, 46, 65, 81, 91, 92, 81, 55, 11, 1, 12, 30, 52, 75, 96, 112]

cp's OEIS Frontend

A057145 Square array of polygonal numbers T(n,k) = ((n-2)k^2 - (n-4)k)/2, n >= 2, k >= 1, read by antidiagonals upwards.

Table of values

List of values

n	a(n)
2	1
3	1
4	2
5	1
6	3
7	3
8	1
9	4
10	6
11	4
12	1
13	5
14	9
15	10
16	5
17	1
18	6
19	12
20	16
21	15
22	6
23	1
24	7
25	15
26	22
27	25
28	21
29	7
30	1
31	8
32	18
33	28
34	35
35	36
36	28
37	8
38	1
39	9
40	21
41	34
42	45
43	51
44	49
45	36
46	9
47	1
48	10
49	24
50	40
51	55
52	66
53	70
54	64
55	45
56	10
57	1
58	11
59	27
60	46
61	65
62	81
63	91
64	92
65	81
66	55
67	11
68	1
69	12
70	30
71	52
72	75
73	96
74	112

n	a(n)
2	1
3	1
4	2
5	1
6	3
7	3
8	1
9	4
10	6
11	4
12	1
13	5
14	9
15	10
16	5
17	1
18	6
19	12
20	16
21	15
22	6
23	1
24	7
25	15
26	22
27	25
28	21
29	7
30	1
31	8
32	18
33	28
34	35
35	36
36	28
37	8
38	1
39	9
40	21
41	34
42	45
43	51
44	49
45	36
46	9
47	1
48	10
49	24
50	40
51	55
52	66
53	70
54	64
55	45
56	10
57	1
58	11
59	27
60	46
61	65
62	81
63	91
64	92
65	81
66	55
67	11
68	1
69	12
70	30
71	52
72	75
73	96
74	112

cp's OEIS Frontend

A057145 Square array of polygonal numbers T(n,k) = ((n-2)*k^2 - (n-4)*k)/2, n >= 2, k >= 1, read by antidiagonals upwards.

Table of values

List of values

A057145 Square array of polygonal numbers T(n,k) = ((n-2)k^2 - (n-4)k)/2, n >= 2, k >= 1, read by antidiagonals upwards.

n	a(n)
2	1
3	1
4	2
5	1
6	3
7	3
8	1
9	4
10	6
11	4
12	1
13	5
14	9
15	10
16	5
17	1
18	6
19	12
20	16
21	15
22	6
23	1
24	7
25	15
26	22
27	25
28	21
29	7
30	1
31	8
32	18
33	28
34	35
35	36
36	28
37	8
38	1
39	9
40	21
41	34
42	45
43	51
44	49
45	36
46	9
47	1
48	10
49	24
50	40
51	55
52	66
53	70
54	64
55	45
56	10
57	1
58	11
59	27
60	46
61	65
62	81
63	91
64	92
65	81
66	55
67	11
68	1
69	12
70	30
71	52
72	75
73	96
74	112