A071569 - cp's OEIS frontend

A071569 Det(M_n) where M_n is the n X n matrix m(i,j)=1 if floor(i/j) is even, 0 otherwise.

n	a(n)
1	0
2	-1
3	0
4	-2
5	1
6	0
7	-1
8	-3
9	3
10	-2
11	1
12	1
13	-2
14	3
15	-2
16	-6
17	5
18	-5
19	4
20	-2
21	3
22	-2
23	1
24	3
25	-3
26	4
27	-4
28	6
29	-7
30	6
31	-7
32	-9
33	10
34	-9
35	10
36	-10
37	9
38	-8
39	9
40	-5
41	4
42	-5
43	4
44	-2
45	2
46	-1
47	0
48	8
49	-8
50	8
51	-7
52	9
53	-10
54	10
55	-9
56	13
57	-12
58	13
59	-14
60	12
61	-13
62	14
63	-14
64	-18
65	19
66	-20
67	19
68	-17
69	18
70	-19
71	18
72	-18
73	17
74	-16
75	16
76	-14
77	15

[0, -1, 0, -2, 1, 0, -1, -3, 3, -2, 1, 1, -2, 3, -2, -6, 5, -5, 4, -2, 3, -2, 1, 3, -3, 4, -4, 6, -7, 6, -7, -9, 10, -9, 10, -10, 9, -8, 9, -5, 4, -5, 4, -2, 2, -1, 0, 8, -8, 8, -7, 9, -10, 10, -9, 13, -12, 13, -14, 12, -13, 14, -14, -18, 19, -20, 19, -17, 18, -19, 18, -18, 17, -16, 16, -14, 15]

cp's OEIS Frontend

A071569 Det(M_n) where M_n is the n X n matrix m(i,j)=1 if floor(i/j) is even, 0 otherwise.

Table of values

List of values

n	a(n)
1	0
2	-1
3	0
4	-2
5	1
6	0
7	-1
8	-3
9	3
10	-2
11	1
12	1
13	-2
14	3
15	-2
16	-6
17	5
18	-5
19	4
20	-2
21	3
22	-2
23	1
24	3
25	-3
26	4
27	-4
28	6
29	-7
30	6
31	-7
32	-9
33	10
34	-9
35	10
36	-10
37	9
38	-8
39	9
40	-5
41	4
42	-5
43	4
44	-2
45	2
46	-1
47	0
48	8
49	-8
50	8
51	-7
52	9
53	-10
54	10
55	-9
56	13
57	-12
58	13
59	-14
60	12
61	-13
62	14
63	-14
64	-18
65	19
66	-20
67	19
68	-17
69	18
70	-19
71	18
72	-18
73	17
74	-16
75	16
76	-14
77	15

n	a(n)
1	0
2	-1
3	0
4	-2
5	1
6	0
7	-1
8	-3
9	3
10	-2
11	1
12	1
13	-2
14	3
15	-2
16	-6
17	5
18	-5
19	4
20	-2
21	3
22	-2
23	1
24	3
25	-3
26	4
27	-4
28	6
29	-7
30	6
31	-7
32	-9
33	10
34	-9
35	10
36	-10
37	9
38	-8
39	9
40	-5
41	4
42	-5
43	4
44	-2
45	2
46	-1
47	0
48	8
49	-8
50	8
51	-7
52	9
53	-10
54	10
55	-9
56	13
57	-12
58	13
59	-14
60	12
61	-13
62	14
63	-14
64	-18
65	19
66	-20
67	19
68	-17
69	18
70	-19
71	18
72	-18
73	17
74	-16
75	16
76	-14
77	15

n	a(n)
1	0
2	-1
3	0
4	-2
5	1
6	0
7	-1
8	-3
9	3
10	-2
11	1
12	1
13	-2
14	3
15	-2
16	-6
17	5
18	-5
19	4
20	-2
21	3
22	-2
23	1
24	3
25	-3
26	4
27	-4
28	6
29	-7
30	6
31	-7
32	-9
33	10
34	-9
35	10
36	-10
37	9
38	-8
39	9
40	-5
41	4
42	-5
43	4
44	-2
45	2
46	-1
47	0
48	8
49	-8
50	8
51	-7
52	9
53	-10
54	10
55	-9
56	13
57	-12
58	13
59	-14
60	12
61	-13
62	14
63	-14
64	-18
65	19
66	-20
67	19
68	-17
69	18
70	-19
71	18
72	-18
73	17
74	-16
75	16
76	-14
77	15