A066808 - cp's OEIS frontend

A066808 a(n) = F(n)-1 mod 2^n+1 with F(n) = n-th Fermat number = 1+2^2^n.

n	a(n)
0	0
1	1
2	1
3	4
4	1
5	4
6	16
7	4
8	1
9	256
10	16
11	4
12	4081
13	4
14	16
15	256
16	1
17	4
18	261121
19	4
20	65536
21	256
22	16
23	4
24	65536
25	33554305
26	16
27	67108864
28	65536
29	4
30	16
31	4
32	1
33	256
34	16
35	262144
36	68451041281
37	4
38	16
39	256
40	65536
41	4
42	4398042316801
43	4
44	65536
45	35184371957761
46	16
47	4
48	281474976645121

[0, 1, 1, 4, 1, 4, 16, 4, 1, 256, 16, 4, 4081, 4, 16, 256, 1, 4, 261121, 4, 65536, 256, 16, 4, 65536, 33554305, 16, 67108864, 65536, 4, 16, 4, 1, 256, 16, 262144, 68451041281, 4, 16, 256, 65536, 4, 4398042316801, 4, 65536, 35184371957761, 16, 4, 281474976645121]

cp's OEIS Frontend

A066808 a(n) = F(n)-1 mod 2^n+1 with F(n) = n-th Fermat number = 1+2^2^n.

Table of values

List of values