A228781 - cp's OEIS frontend

A228781 Irregular triangle read by rows: coefficients of minimal polynomial of a certain algebraic number S2(2k+1) from Q(2cos(Pi/n)) related to the regular (2*k+1)-gon, k >= 1.

n	a(n)
1	-3
2	1
3	5
4	-10
5	1
6	-7
7	35
8	-21
9	1
10	-3
11	27
12	-33
13	1
14	-11
15	165
16	-462
17	330
18	-55
19	1
20	13
21	-286
22	1287
23	-1716
24	715
25	-78
26	1
27	1
28	-28
29	134
30	-92
31	1
32	17
33	-680
34	6188
35	-19448
36	24310
37	-12376
38	2380
39	-136
40	1
41	-19
42	969
43	-11628
44	50388
45	-92378
46	75582
47	-27132
48	3876
49	-171
50	1
51	1
52	-58
53	655
54	-1772
55	1423
56	-186
57	1

[-3, 1, 5, -10, 1, -7, 35, -21, 1, -3, 27, -33, 1, -11, 165, -462, 330, -55, 1, 13, -286, 1287, -1716, 715, -78, 1, 1, -28, 134, -92, 1, 17, -680, 6188, -19448, 24310, -12376, 2380, -136, 1, -19, 969, -11628, 50388, -92378, 75582, -27132, 3876, -171, 1, 1, -58, 655, -1772, 1423, -186, 1]

cp's OEIS Frontend

A228781 Irregular triangle read by rows: coefficients of minimal polynomial of a certain algebraic number S2(2k+1) from Q(2cos(Pi/n)) related to the regular (2*k+1)-gon, k >= 1.

Table of values

List of values

cp's OEIS Frontend

A228781 Irregular triangle read by rows: coefficients of minimal polynomial of a certain algebraic number S2(2*k+1) from Q(2*cos(Pi/n)) related to the regular (2*k+1)-gon, k >= 1.

Table of values

List of values

A228781 Irregular triangle read by rows: coefficients of minimal polynomial of a certain algebraic number S2(2k+1) from Q(2cos(Pi/n)) related to the regular (2*k+1)-gon, k >= 1.