A186257 - cp's OEIS frontend

A186257 a(n) = 5b_5(n)+4, where b_5 lists the indices of zeros of the sequence A261305: u(n) = abs(u(n-1)-gcd(u(n-1),5n-1)), u(1) = 1.

n	a(n)
1	14
2	89
3	479
4	2879
5	17099
6	99839
7	599009
8	3592859
9	21557099
10	129336149
11	775914479
12	4655486369
13	27932918219
14	167597509319
15	1005582321329
16	6033492323549
17	36200953941059
18	217205705087639
19	1303234230378959
20	7819405361540219

[14, 89, 479, 2879, 17099, 99839, 599009, 3592859, 21557099, 129336149, 775914479, 4655486369, 27932918219, 167597509319, 1005582321329, 6033492323549, 36200953941059, 217205705087639, 1303234230378959, 7819405361540219]

cp's OEIS Frontend

A186257 a(n) = 5b_5(n)+4, where b_5 lists the indices of zeros of the sequence A261305: u(n) = abs(u(n-1)-gcd(u(n-1),5n-1)), u(1) = 1.

Table of values

List of values

cp's OEIS Frontend

A186257 a(n) = 5*b_5(n)+4, where b_5 lists the indices of zeros of the sequence A261305: u(n) = abs(u(n-1)-gcd(u(n-1),5*n-1)), u(1) = 1.

Table of values

List of values

A186257 a(n) = 5b_5(n)+4, where b_5 lists the indices of zeros of the sequence A261305: u(n) = abs(u(n-1)-gcd(u(n-1),5n-1)), u(1) = 1.