A130194 - cp's OEIS frontend

A130194 Let M = lower triangular matrix with 1's on and below the main diagonal, with columns multiplied by +1, +1, -1, -1, repeated; form M^2; read across rows of resulting triangle.

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

[1, 2, 1, -1, 2, 1, -4, -1, 2, 1, 1, -4, -1, 2, 1, 6, 1, -4, -1, 2, 1, -1, 6, 1, -4, -1, 2, 1, -8, -1, 6, 1, -4, -1, 2, 1, 1, -8, -1, 6, 1, -4, -1, 2, 1, 10, 1, -8, -1, 6, 1, -4, -1, 2, 1, -1, 10, 1, -8, -1, 6, 1, -4, -1, 2, 1, -12, -1, 10, 1, -8, -1, 6, 1, -4, -1, 2, 1]

cp's OEIS Frontend

A130194 Let M = lower triangular matrix with 1's on and below the main diagonal, with columns multiplied by +1, +1, -1, -1, repeated; form M^2; read across rows of resulting triangle.

Table of values

List of values

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

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

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