A152090 - cp's OEIS frontend

A152090 a(n) = 2^nProduct_{k=1..floor((n-1)/2)} (1 + 2cos(kPi/n)^2 + 4cos(k*Pi/n)^4).

n	a(n)
0	1
1	1
2	1
3	3
4	7
5	16
6	39
7	91
8	217
9	513
10	1216
11	2881
12	6825
13	16171
14	38311
15	90768
16	215047
17	509491
18	1207089
19	2859841
20	6775552
21	16052673
22	38032081
23	90105811
24	213479175
25	505776016
26	1198287271
27	2838988683
28	6726147337
29	15935624641
30	37754768064

[1, 1, 1, 3, 7, 16, 39, 91, 217, 513, 1216, 2881, 6825, 16171, 38311, 90768, 215047, 509491, 1207089, 2859841, 6775552, 16052673, 38032081, 90105811, 213479175, 505776016, 1198287271, 2838988683, 6726147337, 15935624641, 37754768064]

cp's OEIS Frontend

A152090 a(n) = 2^nProduct_{k=1..floor((n-1)/2)} (1 + 2cos(kPi/n)^2 + 4cos(k*Pi/n)^4).

Table of values

List of values

cp's OEIS Frontend

A152090 a(n) = 2^n*Product_{k=1..floor((n-1)/2)} (1 + 2*cos(k*Pi/n)^2 + 4*cos(k*Pi/n)^4).

Table of values

List of values

A152090 a(n) = 2^nProduct_{k=1..floor((n-1)/2)} (1 + 2cos(kPi/n)^2 + 4cos(k*Pi/n)^4).