A306610 - cp's OEIS frontend

A306610 a(n) = (2cos(Pi/15))^(-n) + (2cos(7Pi/15))^(-n) + (2cos(11Pi/15))^(-n) + (2cos(13*Pi/15))^(-n), for n >= 1.

n	a(n)
1	4
2	24
3	109
4	524
5	2504
6	11979
7	57299
8	274084
9	1311049
10	6271254
11	29997829
12	143491199
13	686373809
14	3283190949
15	15704770004
16	75121978804
17	359337430474
18	1718849676159
19	8221921677724
20	39328626006254
21	188124003629279
22	899869747188249
23	4304424455586134

[4, 24, 109, 524, 2504, 11979, 57299, 274084, 1311049, 6271254, 29997829, 143491199, 686373809, 3283190949, 15704770004, 75121978804, 359337430474, 1718849676159, 8221921677724, 39328626006254, 188124003629279, 899869747188249, 4304424455586134]

cp's OEIS Frontend

A306610 a(n) = (2cos(Pi/15))^(-n) + (2cos(7Pi/15))^(-n) + (2cos(11Pi/15))^(-n) + (2cos(13*Pi/15))^(-n), for n >= 1.

Table of values

List of values

cp's OEIS Frontend

A306610 a(n) = (2*cos(Pi/15))^(-n) + (2*cos(7*Pi/15))^(-n) + (2*cos(11*Pi/15))^(-n) + (2*cos(13*Pi/15))^(-n), for n >= 1.

Table of values

List of values

A306610 a(n) = (2cos(Pi/15))^(-n) + (2cos(7Pi/15))^(-n) + (2cos(11Pi/15))^(-n) + (2cos(13*Pi/15))^(-n), for n >= 1.