A143999 - cp's OEIS frontend

A143999 Rectangular array by antidiagonals: label each unit square in the first quadrant lattice by its northeast vertex (x,y) and mark squares for which (x,y) is congruent mod 4 to one of the following: (1,1), (2,3), (3,2), (4,0); then R(m,n) is the number of UNmarked squares in the rectangle [0,m]x[0,n].

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	2
12	2
13	3
14	2
15	2
16	2
17	3
18	3
19	3
20	3
21	2
22	2
23	3
24	4
25	4
26	4
27	3
28	2
29	2
30	4
31	5
32	5
33	5
34	5
35	4
36	2
37	3
38	4
39	6
40	6
41	7
42	6
43	6
44	4
45	3
46	3
47	5
48	6
49	7
50	8
51	8
52	7
53	6
54	5
55	3
56	3
57	5
58	7
59	8
60	9
61	9
62	9
63	8
64	7
65	5
66	3
67	3
68	6
69	8
70	9
71	10
72	11
73	11
74	10
75	9
76	8
77	6
78	3
79	4
80	6
81	9
82	10
83	12
84	12
85	13
86	12
87	12
88	10
89	9
90	6
91	4
92	4
93	7
94	9
95	11
96	13
97	14
98	14

[1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 2, 2, 3, 2, 2, 2, 3, 3, 3, 3, 2, 2, 3, 4, 4, 4, 3, 2, 2, 4, 5, 5, 5, 5, 4, 2, 3, 4, 6, 6, 7, 6, 6, 4, 3, 3, 5, 6, 7, 8, 8, 7, 6, 5, 3, 3, 5, 7, 8, 9, 9, 9, 8, 7, 5, 3, 3, 6, 8, 9, 10, 11, 11, 10, 9, 8, 6, 3, 4, 6, 9, 10, 12, 12, 13, 12, 12, 10, 9, 6, 4, 4, 7, 9, 11, 13, 14, 14]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	2
12	2
13	3
14	2
15	2
16	2
17	3
18	3
19	3
20	3
21	2
22	2
23	3
24	4
25	4
26	4
27	3
28	2
29	2
30	4
31	5
32	5
33	5
34	5
35	4
36	2
37	3
38	4
39	6
40	6
41	7
42	6
43	6
44	4
45	3
46	3
47	5
48	6
49	7
50	8
51	8
52	7
53	6
54	5
55	3
56	3
57	5
58	7
59	8
60	9
61	9
62	9
63	8
64	7
65	5
66	3
67	3
68	6
69	8
70	9
71	10
72	11
73	11
74	10
75	9
76	8
77	6
78	3
79	4
80	6
81	9
82	10
83	12
84	12
85	13
86	12
87	12
88	10
89	9
90	6
91	4
92	4
93	7
94	9
95	11
96	13
97	14
98	14

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	2
12	2
13	3
14	2
15	2
16	2
17	3
18	3
19	3
20	3
21	2
22	2
23	3
24	4
25	4
26	4
27	3
28	2
29	2
30	4
31	5
32	5
33	5
34	5
35	4
36	2
37	3
38	4
39	6
40	6
41	7
42	6
43	6
44	4
45	3
46	3
47	5
48	6
49	7
50	8
51	8
52	7
53	6
54	5
55	3
56	3
57	5
58	7
59	8
60	9
61	9
62	9
63	8
64	7
65	5
66	3
67	3
68	6
69	8
70	9
71	10
72	11
73	11
74	10
75	9
76	8
77	6
78	3
79	4
80	6
81	9
82	10
83	12
84	12
85	13
86	12
87	12
88	10
89	9
90	6
91	4
92	4
93	7
94	9
95	11
96	13
97	14
98	14

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	2
12	2
13	3
14	2
15	2
16	2
17	3
18	3
19	3
20	3
21	2
22	2
23	3
24	4
25	4
26	4
27	3
28	2
29	2
30	4
31	5
32	5
33	5
34	5
35	4
36	2
37	3
38	4
39	6
40	6
41	7
42	6
43	6
44	4
45	3
46	3
47	5
48	6
49	7
50	8
51	8
52	7
53	6
54	5
55	3
56	3
57	5
58	7
59	8
60	9
61	9
62	9
63	8
64	7
65	5
66	3
67	3
68	6
69	8
70	9
71	10
72	11
73	11
74	10
75	9
76	8
77	6
78	3
79	4
80	6
81	9
82	10
83	12
84	12
85	13
86	12
87	12
88	10
89	9
90	6
91	4
92	4
93	7
94	9
95	11
96	13
97	14
98	14