A171142 - cp's OEIS frontend

A171142 Triangle T(n,k) of the coefficients [x^k] of the polynomial p_n(x), where p_n(x)=(1+x)*p_{n-1}(x) if n even, p_n(x) = (x^2+4x+1)^((n-1)/2) if n odd.

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	1
8	5
9	5
10	1
11	1
12	8
13	18
14	8
15	1
16	1
17	9
18	26
19	26
20	9
21	1
22	1
23	12
24	51
25	88
26	51
27	12
28	1
29	1
30	13
31	63
32	139
33	139
34	63
35	13
36	1
37	1
38	16
39	100
40	304
41	454
42	304
43	100
44	16
45	1
46	1
47	17
48	116
49	404
50	758
51	758
52	404
53	116
54	17
55	1
56	1
57	20
58	165
59	720
60	1770
61	2424
62	1770
63	720
64	165
65	20
66	1
67	1
68	21
69	185
70	885

[1, 1, 1, 1, 4, 1, 1, 5, 5, 1, 1, 8, 18, 8, 1, 1, 9, 26, 26, 9, 1, 1, 12, 51, 88, 51, 12, 1, 1, 13, 63, 139, 139, 63, 13, 1, 1, 16, 100, 304, 454, 304, 100, 16, 1, 1, 17, 116, 404, 758, 758, 404, 116, 17, 1, 1, 20, 165, 720, 1770, 2424, 1770, 720, 165, 20, 1, 1, 21, 185, 885]

cp's OEIS Frontend

A171142 Triangle T(n,k) of the coefficients [x^k] of the polynomial p_n(x), where p_n(x)=(1+x)*p_{n-1}(x) if n even, p_n(x) = (x^2+4x+1)^((n-1)/2) if n odd.

Table of values

List of values