A143901 - cp's OEIS frontend

A143901 Rectangular array R by antidiagonals: R(m,n) = floor((m*n+1)/2).

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

[1, 1, 1, 2, 2, 2, 2, 3, 3, 2, 3, 4, 5, 4, 3, 3, 5, 6, 6, 5, 3, 4, 6, 8, 8, 8, 6, 4, 4, 7, 9, 10, 10, 9, 7, 4, 5, 8, 11, 12, 13, 12, 11, 8, 5, 5, 9, 12, 14, 15, 15, 14, 12, 9, 5, 6, 10, 14, 16, 18, 18, 18, 16, 14, 10, 6, 6, 11, 15, 18, 20, 21, 21, 20, 18, 15, 11, 6, 7, 12, 17, 20, 23, 24, 25, 24]

cp's OEIS Frontend

A143901 Rectangular array R by antidiagonals: R(m,n) = floor((m*n+1)/2).

Table of values

List of values

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

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

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