A159255 - cp's OEIS frontend

A159255 Irregular triangle read by rows: row n gives expansion of (1-x+x^2)*(1+x)^n.

n	a(n)
0	1
1	-1
2	1
3	1
4	0
5	0
6	1
7	1
8	1
9	0
10	1
11	1
12	1
13	2
14	1
15	1
16	2
17	1
18	1
19	3
20	3
21	2
22	3
23	3
24	1
25	1
26	4
27	6
28	5
29	5
30	6
31	4
32	1
33	1
34	5
35	10
36	11
37	10
38	11
39	10
40	5
41	1
42	1
43	6
44	15
45	21
46	21
47	21
48	21
49	15
50	6
51	1
52	1
53	7
54	21
55	36
56	42
57	42
58	42
59	36
60	21
61	7
62	1
63	1
64	8
65	28
66	57
67	78
68	84
69	84
70	78
71	57
72	28
73	8
74	1
75	1
76	9
77	36
78	85
79	135
80	162
81	168
82	162
83	135
84	85
85	36
86	9
87	1

[1, -1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 2, 1, 1, 2, 1, 1, 3, 3, 2, 3, 3, 1, 1, 4, 6, 5, 5, 6, 4, 1, 1, 5, 10, 11, 10, 11, 10, 5, 1, 1, 6, 15, 21, 21, 21, 21, 15, 6, 1, 1, 7, 21, 36, 42, 42, 42, 36, 21, 7, 1, 1, 8, 28, 57, 78, 84, 84, 78, 57, 28, 8, 1, 1, 9, 36, 85, 135, 162, 168, 162, 135, 85, 36, 9, 1]

cp's OEIS Frontend

A159255 Irregular triangle read by rows: row n gives expansion of (1-x+x^2)*(1+x)^n.

Table of values

List of values

n	a(n)
0	1
1	-1
2	1
3	1
4	0
5	0
6	1
7	1
8	1
9	0
10	1
11	1
12	1
13	2
14	1
15	1
16	2
17	1
18	1
19	3
20	3
21	2
22	3
23	3
24	1
25	1
26	4
27	6
28	5
29	5
30	6
31	4
32	1
33	1
34	5
35	10
36	11
37	10
38	11
39	10
40	5
41	1
42	1
43	6
44	15
45	21
46	21
47	21
48	21
49	15
50	6
51	1
52	1
53	7
54	21
55	36
56	42
57	42
58	42
59	36
60	21
61	7
62	1
63	1
64	8
65	28
66	57
67	78
68	84
69	84
70	78
71	57
72	28
73	8
74	1
75	1
76	9
77	36
78	85
79	135
80	162
81	168
82	162
83	135
84	85
85	36
86	9
87	1

n	a(n)
0	1
1	-1
2	1
3	1
4	0
5	0
6	1
7	1
8	1
9	0
10	1
11	1
12	1
13	2
14	1
15	1
16	2
17	1
18	1
19	3
20	3
21	2
22	3
23	3
24	1
25	1
26	4
27	6
28	5
29	5
30	6
31	4
32	1
33	1
34	5
35	10
36	11
37	10
38	11
39	10
40	5
41	1
42	1
43	6
44	15
45	21
46	21
47	21
48	21
49	15
50	6
51	1
52	1
53	7
54	21
55	36
56	42
57	42
58	42
59	36
60	21
61	7
62	1
63	1
64	8
65	28
66	57
67	78
68	84
69	84
70	78
71	57
72	28
73	8
74	1
75	1
76	9
77	36
78	85
79	135
80	162
81	168
82	162
83	135
84	85
85	36
86	9
87	1

n	a(n)
0	1
1	-1
2	1
3	1
4	0
5	0
6	1
7	1
8	1
9	0
10	1
11	1
12	1
13	2
14	1
15	1
16	2
17	1
18	1
19	3
20	3
21	2
22	3
23	3
24	1
25	1
26	4
27	6
28	5
29	5
30	6
31	4
32	1
33	1
34	5
35	10
36	11
37	10
38	11
39	10
40	5
41	1
42	1
43	6
44	15
45	21
46	21
47	21
48	21
49	15
50	6
51	1
52	1
53	7
54	21
55	36
56	42
57	42
58	42
59	36
60	21
61	7
62	1
63	1
64	8
65	28
66	57
67	78
68	84
69	84
70	78
71	57
72	28
73	8
74	1
75	1
76	9
77	36
78	85
79	135
80	162
81	168
82	162
83	135
84	85
85	36
86	9
87	1