A220354 - cp's OEIS frontend

A220354 Irregular triangle T(n,k), read by rows; row n gives coefficients in expansion of P_n(x), which is defined by: P_0(x) = 1, P_n(x) = P_(n-1)(x)+x if n odd, P_n(x) = P_(n-1)(x)*x if n even.

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

[1, 1, 1, 0, 1, 1, 0, 2, 1, 0, 0, 2, 1, 0, 1, 2, 1, 0, 0, 1, 2, 1, 0, 1, 1, 2, 1, 0, 0, 1, 1, 2, 1, 0, 1, 1, 1, 2, 1, 0, 0, 1, 1, 1, 2, 1, 0, 1, 1, 1, 1, 2, 1, 0, 0, 1, 1, 1, 1, 2, 1, 0, 1, 1, 1, 1, 1, 2, 1, 0, 0, 1, 1, 1, 1, 1, 2, 1, 0, 1, 1, 1, 1, 1, 1, 2, 1]

cp's OEIS Frontend

A220354 Irregular triangle T(n,k), read by rows; row n gives coefficients in expansion of P_n(x), which is defined by: P_0(x) = 1, P_n(x) = P_(n-1)(x)+x if n odd, P_n(x) = P_(n-1)(x)*x if n even.

Table of values

List of values

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

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

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