A353890 - cp's OEIS frontend

A353890 a(n) is the period of the binary sequence {b(m)} defined by b(m) = 1 if (m+1)^n - m^n and (m+2)^n - 2*(m+1)^n + m^n are coprime, 0 otherwise.

n	a(n)
2	1
3	1
4	5
5	11
6	91
7	1247
8	3485
9	263017
10	852841
11	1241058127
12	74966255
13	243641132605417
14	181556731572385303
15	718802057694183783881
16	6582662048285
17	943422576750791493013356207217
18	487331778345355477261
19	607088607861933740557075591887834842297

[1, 1, 5, 11, 91, 1247, 3485, 263017, 852841, 1241058127, 74966255, 243641132605417, 181556731572385303, 718802057694183783881, 6582662048285, 943422576750791493013356207217, 487331778345355477261, 607088607861933740557075591887834842297]

cp's OEIS Frontend

A353890 a(n) is the period of the binary sequence {b(m)} defined by b(m) = 1 if (m+1)^n - m^n and (m+2)^n - 2*(m+1)^n + m^n are coprime, 0 otherwise.

Table of values

List of values