A131183 - cp's OEIS frontend

A131183 a(n) = a(n-1) + a(n-2) if n == 3 mod 4; a(n) = a(n-1) - a(n-2) if n == 0 mod 4; a(n) = a(n-1)*a(n-2) if n == 1 mod 4; and a(n) = a(n-1)/a(n-2) if n == 2 mod 4; with a(1)=a(2)=1.

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	2
7	4
8	2
9	8
10	4
11	12
12	8
13	96
14	12
15	108
16	96
17	10368
18	108
19	10476
20	10368
21	108615168
22	10476
23	108625644
24	108615168
25	11798392572168192
26	108625644
27	11798392680793836
28	11798392572168192
29	139202068568601556987554268864512

[1, 1, 2, 1, 2, 2, 4, 2, 8, 4, 12, 8, 96, 12, 108, 96, 10368, 108, 10476, 10368, 108615168, 10476, 108625644, 108615168, 11798392572168192, 108625644, 11798392680793836, 11798392572168192, 139202068568601556987554268864512]

cp's OEIS Frontend

A131183 a(n) = a(n-1) + a(n-2) if n == 3 mod 4; a(n) = a(n-1) - a(n-2) if n == 0 mod 4; a(n) = a(n-1)*a(n-2) if n == 1 mod 4; and a(n) = a(n-1)/a(n-2) if n == 2 mod 4; with a(1)=a(2)=1.

Table of values

List of values