A343854 - cp's OEIS frontend

A343854 Irregular triangle read by rows: the n-th row gives the column indices of the matrix of 1..n^2 filled successively back and forth along antidiagonals.

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

[1, 1, 2, 1, 2, 1, 2, 1, 1, 2, 3, 3, 2, 3, 1, 2, 1, 1, 2, 3, 4, 3, 2, 1, 2, 3, 4, 4, 3, 4, 1, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 3, 4, 5, 5, 4, 3, 2, 3, 4, 5, 5, 4, 5, 1, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 5, 4, 3, 2, 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 4, 5, 6, 6, 5, 6]

cp's OEIS Frontend

A343854 Irregular triangle read by rows: the n-th row gives the column indices of the matrix of 1..n^2 filled successively back and forth along antidiagonals.

Table of values

List of values

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

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

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