A143902 - cp's OEIS frontend

A143902 Rectangular array R by antidiagonals: R(m,n) = number of black squares.

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	1
7	2
8	3
9	3
10	2
11	2
12	4
13	4
14	4
15	2
16	3
17	5
18	6
19	6
20	5
21	3
22	3
23	6
24	7
25	8
26	7
27	6
28	3
29	4
30	7
31	9
32	10
33	10
34	9
35	7
36	4
37	4
38	8
39	10
40	12
41	12
42	12
43	10
44	8
45	4
46	5
47	9
48	12
49	14
50	15
51	15
52	14
53	12
54	9
55	5
56	5
57	10
58	13
59	16
60	17
61	18
62	17
63	16
64	13
65	10
66	5
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	6
80	12
81	16
82	20
83	22

[0, 1, 1, 1, 2, 1, 2, 3, 3, 2, 2, 4, 4, 4, 2, 3, 5, 6, 6, 5, 3, 3, 6, 7, 8, 7, 6, 3, 4, 7, 9, 10, 10, 9, 7, 4, 4, 8, 10, 12, 12, 12, 10, 8, 4, 5, 9, 12, 14, 15, 15, 14, 12, 9, 5, 5, 10, 13, 16, 17, 18, 17, 16, 13, 10, 5, 6, 11, 15, 18, 20, 21, 21, 20, 18, 15, 11, 6, 6, 12, 16, 20, 22]

cp's OEIS Frontend

A143902 Rectangular array R by antidiagonals: R(m,n) = number of black squares.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	1
7	2
8	3
9	3
10	2
11	2
12	4
13	4
14	4
15	2
16	3
17	5
18	6
19	6
20	5
21	3
22	3
23	6
24	7
25	8
26	7
27	6
28	3
29	4
30	7
31	9
32	10
33	10
34	9
35	7
36	4
37	4
38	8
39	10
40	12
41	12
42	12
43	10
44	8
45	4
46	5
47	9
48	12
49	14
50	15
51	15
52	14
53	12
54	9
55	5
56	5
57	10
58	13
59	16
60	17
61	18
62	17
63	16
64	13
65	10
66	5
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	6
80	12
81	16
82	20
83	22

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	1
7	2
8	3
9	3
10	2
11	2
12	4
13	4
14	4
15	2
16	3
17	5
18	6
19	6
20	5
21	3
22	3
23	6
24	7
25	8
26	7
27	6
28	3
29	4
30	7
31	9
32	10
33	10
34	9
35	7
36	4
37	4
38	8
39	10
40	12
41	12
42	12
43	10
44	8
45	4
46	5
47	9
48	12
49	14
50	15
51	15
52	14
53	12
54	9
55	5
56	5
57	10
58	13
59	16
60	17
61	18
62	17
63	16
64	13
65	10
66	5
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	6
80	12
81	16
82	20
83	22

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	1
7	2
8	3
9	3
10	2
11	2
12	4
13	4
14	4
15	2
16	3
17	5
18	6
19	6
20	5
21	3
22	3
23	6
24	7
25	8
26	7
27	6
28	3
29	4
30	7
31	9
32	10
33	10
34	9
35	7
36	4
37	4
38	8
39	10
40	12
41	12
42	12
43	10
44	8
45	4
46	5
47	9
48	12
49	14
50	15
51	15
52	14
53	12
54	9
55	5
56	5
57	10
58	13
59	16
60	17
61	18
62	17
63	16
64	13
65	10
66	5
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	6
80	12
81	16
82	20
83	22