A186256 - cp's OEIS frontend

A186256 a(n) = 4b_4(n)+3, where b_4 lists the indices of zeros of the sequence A261304: u(n) = abs(u(n-1)-gcd(u(n-1),4n-1)), u(1) = 1.

n	a(n)
1	11
2	59
3	251
4	1259
5	6299
6	31387
7	152083
8	758971
9	3790651
10	18953251
11	94766251
12	473831251
13	2369156107
14	11845755043
15	59228775043
16	296143874947
17	1480718773123
18	7403593861843
19	37017965808931
20	185089757395379
21	925448786976163
22	4627243883546971
23	23136219387534283

[11, 59, 251, 1259, 6299, 31387, 152083, 758971, 3790651, 18953251, 94766251, 473831251, 2369156107, 11845755043, 59228775043, 296143874947, 1480718773123, 7403593861843, 37017965808931, 185089757395379, 925448786976163, 4627243883546971, 23136219387534283]

cp's OEIS Frontend

A186256 a(n) = 4b_4(n)+3, where b_4 lists the indices of zeros of the sequence A261304: u(n) = abs(u(n-1)-gcd(u(n-1),4n-1)), u(1) = 1.

Table of values

List of values

cp's OEIS Frontend

A186256 a(n) = 4*b_4(n)+3, where b_4 lists the indices of zeros of the sequence A261304: u(n) = abs(u(n-1)-gcd(u(n-1),4*n-1)), u(1) = 1.

Table of values

List of values

A186256 a(n) = 4b_4(n)+3, where b_4 lists the indices of zeros of the sequence A261304: u(n) = abs(u(n-1)-gcd(u(n-1),4n-1)), u(1) = 1.