A152118 - cp's OEIS frontend

A152118 a(n) = Product_{k=1..floor((n-1)/2)} (4 + 4cos(kPi/n)^2).

n	a(n)
0	1
1	1
2	1
3	5
4	6
5	29
6	35
7	169
8	204
9	985
10	1189
11	5741
12	6930
13	33461
14	40391
15	195025
16	235416
17	1136689
18	1372105
19	6625109
20	7997214
21	38613965
22	46611179
23	225058681
24	271669860
25	1311738121
26	1583407981
27	7645370045
28	9228778026
29	44560482149
30	53789260175
31	259717522849

[1, 1, 1, 5, 6, 29, 35, 169, 204, 985, 1189, 5741, 6930, 33461, 40391, 195025, 235416, 1136689, 1372105, 6625109, 7997214, 38613965, 46611179, 225058681, 271669860, 1311738121, 1583407981, 7645370045, 9228778026, 44560482149, 53789260175, 259717522849]

cp's OEIS Frontend

A152118 a(n) = Product_{k=1..floor((n-1)/2)} (4 + 4cos(kPi/n)^2).

Table of values

List of values

cp's OEIS Frontend

A152118 a(n) = Product_{k=1..floor((n-1)/2)} (4 + 4*cos(k*Pi/n)^2).

Table of values

List of values

A152118 a(n) = Product_{k=1..floor((n-1)/2)} (4 + 4cos(kPi/n)^2).