A320769 - cp's OEIS frontend

A320769 a(n) where a(n)=-a(-n), a(1)=a(2)=a(3)=a(4)=1, and a(n+2)a(n-2) = a(n+1)a(n-1) - c(n)a(n)^2 where c(3k)=-2, else c(n)=1.

n	a(n)
0	0
1	1
2	1
3	1
4	1
5	3
6	2
7	-7
8	-13
9	-25
10	3
11	-173
12	-332
13	1237
14	2149
15	12969
16	-34411
17	212159
18	729350
19	-5405899
20	2412231
21	-129451889
22	951511591
23	-6624402137
24	-19829335448
25	484740289833
26	-2548271136343
27	27842908929425
28	-353158277960887
29	5055074341844027

[0, 1, 1, 1, 1, 3, 2, -7, -13, -25, 3, -173, -332, 1237, 2149, 12969, -34411, 212159, 729350, -5405899, 2412231, -129451889, 951511591, -6624402137, -19829335448, 484740289833, -2548271136343, 27842908929425, -353158277960887, 5055074341844027]

cp's OEIS Frontend

A320769 a(n) where a(n)=-a(-n), a(1)=a(2)=a(3)=a(4)=1, and a(n+2)a(n-2) = a(n+1)a(n-1) - c(n)a(n)^2 where c(3k)=-2, else c(n)=1.

Table of values

List of values

cp's OEIS Frontend

A320769 a(n) where a(n)=-a(-n), a(1)=a(2)=a(3)=a(4)=1, and a(n+2)*a(n-2) = a(n+1)*a(n-1) - c(n)*a(n)^2 where c(3*k)=-2, else c(n)=1.

Table of values

List of values

A320769 a(n) where a(n)=-a(-n), a(1)=a(2)=a(3)=a(4)=1, and a(n+2)a(n-2) = a(n+1)a(n-1) - c(n)a(n)^2 where c(3k)=-2, else c(n)=1.