A187660 - cp's OEIS frontend

A187660 Triangle read by rows: T(n,k) = (-1)^(floor(3k/2))binomial(floor((n+k)/2),k), 0 <= k <= n.

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

[1, 1, -1, 1, -1, -1, 1, -2, -1, 1, 1, -2, -3, 1, 1, 1, -3, -3, 4, 1, -1, 1, -3, -6, 4, 5, -1, -1, 1, -4, -6, 10, 5, -6, -1, 1, 1, -4, -10, 10, 15, -6, -7, 1, 1, 1, -5, -10, 20, 15, -21, -7, 8, 1, -1, 1, -5, -15, 20, 35, -21, -28, 8, 9, -1, -1, 1, -6, -15, 35, 35, -56, -28, 36, 9, -10, -1, 1]

cp's OEIS Frontend

A187660 Triangle read by rows: T(n,k) = (-1)^(floor(3k/2))binomial(floor((n+k)/2),k), 0 <= k <= n.

Table of values

List of values

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

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

cp's OEIS Frontend

A187660 Triangle read by rows: T(n,k) = (-1)^(floor(3*k/2))*binomial(floor((n+k)/2),k), 0 <= k <= n.

Table of values

List of values

A187660 Triangle read by rows: T(n,k) = (-1)^(floor(3k/2))binomial(floor((n+k)/2),k), 0 <= k <= n.

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