A281726 - cp's OEIS frontend

A281726 Triangular array read by rows: T(n,k) is the number of elements in an n X k matrix that will be assigned the same value whether the integers from 1 to n*k are assigned to elements in row-major order or column-major order.

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	4
8	2
9	2
10	4
11	5
12	2
13	3
14	2
15	5
16	6
17	2
18	2
19	2
20	2
21	6
22	7
23	2
24	3
25	4
26	3
27	2
28	7
29	8
30	2
31	2
32	2
33	2
34	2
35	2
36	8
37	9
38	2
39	3
40	2
41	5
42	2
43	3
44	2
45	9
46	10
47	2
48	2
49	4
50	2
51	2
52	4
53	2
54	2
55	10
56	11
57	2
58	3
59	2
60	3
61	6
62	3
63	2
64	3
65	2
66	11
67	12
68	2
69	2
70	2
71	2
72	2
73	2
74	2
75	2
76	2
77	2
78	12
79	13
80	2
81	3
82	4
83	5
84	2
85	7
86	2
87	5
88	4
89	3
90	2
91	13

[1, 2, 2, 3, 2, 3, 4, 2, 2, 4, 5, 2, 3, 2, 5, 6, 2, 2, 2, 2, 6, 7, 2, 3, 4, 3, 2, 7, 8, 2, 2, 2, 2, 2, 2, 8, 9, 2, 3, 2, 5, 2, 3, 2, 9, 10, 2, 2, 4, 2, 2, 4, 2, 2, 10, 11, 2, 3, 2, 3, 6, 3, 2, 3, 2, 11, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 12, 13, 2, 3, 4, 5, 2, 7, 2, 5, 4, 3, 2, 13]

cp's OEIS Frontend

A281726 Triangular array read by rows: T(n,k) is the number of elements in an n X k matrix that will be assigned the same value whether the integers from 1 to n*k are assigned to elements in row-major order or column-major order.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	4
8	2
9	2
10	4
11	5
12	2
13	3
14	2
15	5
16	6
17	2
18	2
19	2
20	2
21	6
22	7
23	2
24	3
25	4
26	3
27	2
28	7
29	8
30	2
31	2
32	2
33	2
34	2
35	2
36	8
37	9
38	2
39	3
40	2
41	5
42	2
43	3
44	2
45	9
46	10
47	2
48	2
49	4
50	2
51	2
52	4
53	2
54	2
55	10
56	11
57	2
58	3
59	2
60	3
61	6
62	3
63	2
64	3
65	2
66	11
67	12
68	2
69	2
70	2
71	2
72	2
73	2
74	2
75	2
76	2
77	2
78	12
79	13
80	2
81	3
82	4
83	5
84	2
85	7
86	2
87	5
88	4
89	3
90	2
91	13

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	4
8	2
9	2
10	4
11	5
12	2
13	3
14	2
15	5
16	6
17	2
18	2
19	2
20	2
21	6
22	7
23	2
24	3
25	4
26	3
27	2
28	7
29	8
30	2
31	2
32	2
33	2
34	2
35	2
36	8
37	9
38	2
39	3
40	2
41	5
42	2
43	3
44	2
45	9
46	10
47	2
48	2
49	4
50	2
51	2
52	4
53	2
54	2
55	10
56	11
57	2
58	3
59	2
60	3
61	6
62	3
63	2
64	3
65	2
66	11
67	12
68	2
69	2
70	2
71	2
72	2
73	2
74	2
75	2
76	2
77	2
78	12
79	13
80	2
81	3
82	4
83	5
84	2
85	7
86	2
87	5
88	4
89	3
90	2
91	13

n	a(n)
1	1
2	2
3	2
4	3
5	2
6	3
7	4
8	2
9	2
10	4
11	5
12	2
13	3
14	2
15	5
16	6
17	2
18	2
19	2
20	2
21	6
22	7
23	2
24	3
25	4
26	3
27	2
28	7
29	8
30	2
31	2
32	2
33	2
34	2
35	2
36	8
37	9
38	2
39	3
40	2
41	5
42	2
43	3
44	2
45	9
46	10
47	2
48	2
49	4
50	2
51	2
52	4
53	2
54	2
55	10
56	11
57	2
58	3
59	2
60	3
61	6
62	3
63	2
64	3
65	2
66	11
67	12
68	2
69	2
70	2
71	2
72	2
73	2
74	2
75	2
76	2
77	2
78	12
79	13
80	2
81	3
82	4
83	5
84	2
85	7
86	2
87	5
88	4
89	3
90	2
91	13