A136745 - cp's OEIS frontend

A136745 Irregular triangle T(0,0)=1, T(1,0)=-1, T(1,1)=0, T(1,2)=1 and T(n,k) = T(n-1,k-2)-T(n-2,k).

n	a(n)
0	1
1	-1
2	0
3	1
4	-1
5	0
6	-1
7	0
8	1
9	1
10	0
11	-2
12	0
13	-1
14	0
15	1
16	1
17	0
18	2
19	0
20	-3
21	0
22	-1
23	0
24	1
25	-1
26	0
27	3
28	0
29	3
30	0
31	-4
32	0
33	-1
34	0
35	1
36	-1
37	0
38	-3
39	0
40	6
41	0
42	4
43	0
44	-5
45	0
46	-1
47	0
48	1
49	1
50	0
51	-4
52	0
53	-6
54	0
55	10
56	0
57	5
58	0
59	-6
60	0
61	-1
62	0
63	1
64	1
65	0
66	4
67	0
68	-10
69	0
70	-10
71	0
72	15
73	0
74	6
75	0
76	-7
77	0
78	-1
79	0
80	1
81	-1
82	0
83	5
84	0
85	10
86	0
87	-20
88	0
89	-15
90	0
91	21
92	0
93	7
94	0
95	-8
96	0
97	-1
98	0
99	1
100	-1
101	0
102	-5
103	0
104	15
105	0
106	20
107	0

[1, -1, 0, 1, -1, 0, -1, 0, 1, 1, 0, -2, 0, -1, 0, 1, 1, 0, 2, 0, -3, 0, -1, 0, 1, -1, 0, 3, 0, 3, 0, -4, 0, -1, 0, 1, -1, 0, -3, 0, 6, 0, 4, 0, -5, 0, -1, 0, 1, 1, 0, -4, 0, -6, 0, 10, 0, 5, 0, -6, 0, -1, 0, 1, 1, 0, 4, 0, -10, 0, -10, 0, 15, 0, 6, 0, -7, 0, -1, 0, 1, -1, 0, 5, 0, 10, 0, -20, 0, -15, 0, 21, 0, 7, 0, -8, 0, -1, 0, 1, -1, 0, -5, 0, 15, 0, 20, 0]

cp's OEIS Frontend

A136745 Irregular triangle T(0,0)=1, T(1,0)=-1, T(1,1)=0, T(1,2)=1 and T(n,k) = T(n-1,k-2)-T(n-2,k).

Table of values

List of values

n	a(n)
0	1
1	-1
2	0
3	1
4	-1
5	0
6	-1
7	0
8	1
9	1
10	0
11	-2
12	0
13	-1
14	0
15	1
16	1
17	0
18	2
19	0
20	-3
21	0
22	-1
23	0
24	1
25	-1
26	0
27	3
28	0
29	3
30	0
31	-4
32	0
33	-1
34	0
35	1
36	-1
37	0
38	-3
39	0
40	6
41	0
42	4
43	0
44	-5
45	0
46	-1
47	0
48	1
49	1
50	0
51	-4
52	0
53	-6
54	0
55	10
56	0
57	5
58	0
59	-6
60	0
61	-1
62	0
63	1
64	1
65	0
66	4
67	0
68	-10
69	0
70	-10
71	0
72	15
73	0
74	6
75	0
76	-7
77	0
78	-1
79	0
80	1
81	-1
82	0
83	5
84	0
85	10
86	0
87	-20
88	0
89	-15
90	0
91	21
92	0
93	7
94	0
95	-8
96	0
97	-1
98	0
99	1
100	-1
101	0
102	-5
103	0
104	15
105	0
106	20
107	0

n	a(n)
0	1
1	-1
2	0
3	1
4	-1
5	0
6	-1
7	0
8	1
9	1
10	0
11	-2
12	0
13	-1
14	0
15	1
16	1
17	0
18	2
19	0
20	-3
21	0
22	-1
23	0
24	1
25	-1
26	0
27	3
28	0
29	3
30	0
31	-4
32	0
33	-1
34	0
35	1
36	-1
37	0
38	-3
39	0
40	6
41	0
42	4
43	0
44	-5
45	0
46	-1
47	0
48	1
49	1
50	0
51	-4
52	0
53	-6
54	0
55	10
56	0
57	5
58	0
59	-6
60	0
61	-1
62	0
63	1
64	1
65	0
66	4
67	0
68	-10
69	0
70	-10
71	0
72	15
73	0
74	6
75	0
76	-7
77	0
78	-1
79	0
80	1
81	-1
82	0
83	5
84	0
85	10
86	0
87	-20
88	0
89	-15
90	0
91	21
92	0
93	7
94	0
95	-8
96	0
97	-1
98	0
99	1
100	-1
101	0
102	-5
103	0
104	15
105	0
106	20
107	0

n	a(n)
0	1
1	-1
2	0
3	1
4	-1
5	0
6	-1
7	0
8	1
9	1
10	0
11	-2
12	0
13	-1
14	0
15	1
16	1
17	0
18	2
19	0
20	-3
21	0
22	-1
23	0
24	1
25	-1
26	0
27	3
28	0
29	3
30	0
31	-4
32	0
33	-1
34	0
35	1
36	-1
37	0
38	-3
39	0
40	6
41	0
42	4
43	0
44	-5
45	0
46	-1
47	0
48	1
49	1
50	0
51	-4
52	0
53	-6
54	0
55	10
56	0
57	5
58	0
59	-6
60	0
61	-1
62	0
63	1
64	1
65	0
66	4
67	0
68	-10
69	0
70	-10
71	0
72	15
73	0
74	6
75	0
76	-7
77	0
78	-1
79	0
80	1
81	-1
82	0
83	5
84	0
85	10
86	0
87	-20
88	0
89	-15
90	0
91	21
92	0
93	7
94	0
95	-8
96	0
97	-1
98	0
99	1
100	-1
101	0
102	-5
103	0
104	15
105	0
106	20
107	0